Elements - Periodic Table - Android Apps on Google Play Elements - Periodic Table This application is a SIMPLE periodic table of the chemical elements. About ***** The periodic table of the chemical elements is a tabular display of the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior. Features - The periodic table (zoomable and in some devices pinch-zoomable) - Descriptions and illustrations of the elements (touch element for information) The following properties are displayed for each element if the value is currently known by science. Name, Specific heat capacity (25 ∞C) Oxidation states Speed of sound (thin rod) Young's modulus Note: Ad supported application. For ad free version buy Elements - Periodic Table Pro Read more Was ok but... After latest "fix" the app crashes & freezes my phone. Uninstalling.

pijush bhaduri He2+ The best app that I have ever installed for learning the classification of elements of periodic table. lalit kumar It provide all the informations u desire.Really awesome app. Israfeel Khan periodic table vary good table I like it 100% Jenny Shery Waziri So good its helps so much in my studies Satya Prakash Kosuri Elements in ur pocket Its very helpfull for quick understandinding...the chemistry User reviews Full Review pijush bhaduri June 30, 2016 He2+ The best app that I have ever installed for learning the classification of elements of periodic table. lalit kumar June 15, 2014 It provide all the informations u desire.Really awesome app.

Israfeel Khan February 21, 2015 periodic table vary good table I like it 100% Jenny Shery Waziri May 17, 2014 So good its helps so much in my studies Satya Prakash Kosuri October 4, 2014 Elements in ur pocket Its very helpfull for quick understandinding...the chemistry Tanmoy Shome May 12, 2014 Awesome Marks hv really improvd woth this app... really nice 1.... Tahir Ch November 21, 2014 Superb App. It gives all the basic information and it is really very useful. AGAM BHASH May 15, 2015 soo good app for computing its agood app to know about the element more & more... Suteerna Mullick August 4, 2014 Fully encyclopedia Gives complete info abt all the elements Chad Hynes August 19, 2014 Not a big fan Tan Alfred October 6, 2014 I already now cabon!! Aashutosh Shinde August 9, 2014 Awesome Very useful.....!..

:-) Soumya Ranjan Sahu May 8, 2014 Knowlegeous Good app dhirendra sharma September 21, 2014 Nice App yaron Devyani Soni July 23, 2014 W oo oo oo oo Right Nischay Shakya June 28, 2014 No valency Lokesh Kumar October 30, 2014 Smart Mast hai boss Biswanath Debnath September 1, 2014 HUGE DATABASE!!!! SIMPLY AWESOME Rounak Limba December 1, 2016 It is very usefull for me... Cain Graziano November 9, 2014 Love it Highly recommend Shah Khalid March 26, 2015 Shah Super it is nice ATIT PATEL February 10, 2016 Good for Chemistry Students Rahul Kavital October 24, 2016 very good app Shahbaz Malik September 1, 2014 Thnx Good Astik Pawar September 2, 2014 Great...

Good app ravi gond January 10, 2015 Ok Ok Aniruddh Tripathi December 1, 2014 Its good Anushka Kumar August 20, 2014 Perfect Phoenix AZ April 27, 2014 Great A Google User May 3, 2014 Great NEERAJ KUMAR August 31, 2014 Good Muharrem Karaoglu March 13, 2015 Loved it ram singh May 31, 2015 Fantastic Full Review Ron Michel March 18, 2014 well it is a periodic table you do day simple, hate programs that Google or wiki for me.... self contain your info, if you don't want to copy someone's stuff (respect to that) don't link to it, write your own stuff. nothing like seeing your internet is off could not find blahblah.wiki .... A Google User November 23, 2012 Saair Nice app but just need more detail of element found year and founder A Google User September 1, 2012 Great Hope you could add electron affinity.

Thanks! Full Review Animesh Singh May 27, 2013 Not bad Instead using this app I can use periodic table app which has many more features than this. Yet, this is good. But periodic table is better. iElements - Periodic Table of The Chemical Elements on the App Store This application is a SIMPLE periodic table of the chemical elements. About ***** The periodic table of the chemical elements is a tabular display of the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior. Features - The periodic table (pinch-zoomable table) - Descriptions and illustrations of the elements The following properties are displayed for each element if the value is currently known by science. Name, by Vivaliscious28 It is so much easier to find what I need than just using an ordinary periodic table. It gives you extra information on each individual element.

It helped me a lot, especially if I needed it quickly. Copernicium is outdated by Bum on da couch Like the last time anyone called element 112 Uub was when it was element 112's freaking name was some weird thing like Ununbium or something like that but then Copernicium happened and the atomic symbol changed and now it's Cn and I mean I get if you have attachment issues to Uub but like this isn't 2011 anymore sweetheart, you godda move on. It's 2015. Time to accept the Cn and move on. Also no one calls element 114 Ununquadium anymore. It's Floverium now. Sheesh, how disappointing. Customers Also Bought Printable Periodic Table | Excel Templates Home » Education » Printable Periodic Table Printable Periodic Table Musadya | July 17, 2009 | Education | 9 Comments Based on the definition found in wiki , the periodic table of the elements or just periodic table is a tabular display of the chemical elements.

Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring (“periodic”) trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior. The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize and compare all of the many different forms of chemical behavior. The table has found wide application in chemistry, physics, biology, and engineering, especially chemical engineering. The current standard table contains 117 elements as of July 2009 (elements 1-116 and element 118). The last time I learned and used the periodic table before year 1990, the periodic table only consist less than 117 elements and some atomic mass not yet being revealed. And there is no internet at all at that time. So, It was not easy to find periodic table references at that time. Now, it is changed.

It is very easy to find the table in internet and my nephew asked me if I can create a dynamic periodic table he can use to learn. He wants a periodic table that can be used as a reference and printable and also a blank one as a practice worksheet. The possible way to create this kind of periodic table is using excel. And this is the table created for his purpose. This template consist of two worksheets, the first worksheet is the printable periodic table. Just print the worksheet with the paper size you want. The second worksheet is the short information regarding its element found in other wiki site here. Other information beside general information found in table are origin of symbol, density at 20oC, melting point, boiling point, discoverer and year discovery. And the third worksheet is your practice worksheet. You can change the default information to be filled in the blank worksheet based on your needs for your practice. Have a happy learning. Chemical is not as difficult as you think eventhough I have never had a good mark in chemical. You can download the file here . The Periodic Table - YouTube The Periodic Table Want to watch this again later? Sign in to add this video to a playlist. Need to report the video?

Sign in to report inappropriate content. The interactive transcript could not be loaded. Loading... Rating is available when the video has been rented. This feature is not available right now. Please try again later. Uploaded on May 4, 2010 Check us out at The Periodic Table The periodic table of the chemical elements (also periodic table of the elements or just periodic table) is a tabular display of the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior.[1] The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize, and compare all of the many different forms of chemical behavior. The table has found wide application in chemistry, physics, biology, and engineering, especially chemical engineering.

The current standard table contains 118 elements Please like our facebook page Large Periodic Table of Elements Poster | Zazzle Large Periodic Table of Elements Poster $23.80 30% off with code SURPRISEDEAL  30% Off Sitewide | Use Code: SURPRISEDEAL | Ends Thursday | See Details Sold by  About this product Paper Type: Value Poster Paper (Matte) Your walls are a reflection of your personality. So let them speak with your favorite quotes, art, or designs printed on our posters! Choose from up to 5 unique paper types and several sizes to create art that’s a perfect representation of you. 45 lb., 7.5 point thick poster paper Matte finish with a smooth surface Economical option that delivers sharp, clean images with stunning color and vibrancy More paper types available under "Paper Options" Add a premium quality frame as an essential accessory About this design Large Periodic Table of Elements Poster The periodic table of the chemical elements Print (Also Mendeleev's table, periodic table of the elements or just periodic table) is a tabular display of the chemical elements.

Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior. The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize, and compare all of the many different forms of chemical behavior. The table has found wide application in chemistry, physics, biology, and engineering, especially chemical engineering. The current standard table contains 117 elements as of July 2009 All Prints are presented & displayed at the largest size/resolution available. The system will prevent you from choosing a size larger than the image is capable. Range through the sizes available from smallest to largest and choose your size of choice.

zazzle.com/sovereigns* Periodic Table of the Elements - The Muslim Observer Periodic Table of the Elements Muslim Media Network / 0 Comments /in Muslim Media Network /by TMO The periodic table of the chemical elements (also periodic table of the elements or just periodic table) is a tabular display of the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring (â€œperiodicâ€) trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior.In 1789, Antoine Lavoisier published a list of 33 chemical elements. Although Lavoisier grouped the elements into gases, metals, non-metals, and earths, chemists spent the following century searching for a more precise classification scheme. In 1829, Johann Wolfgang DÃ¶bereinerobserved that many of the elements could be grouped into triads (groups of three) based on their chemical properties.

Lithium, sodium, andpotassium, for example, were grouped together as being soft, reactive metals. DÃ¶bereiner also observed that, when arranged by atomic weight, the second member of each triad was roughly the average of the first and the third. This became known as the Law of triads.[citation needed]German chemist Leopold Gmelin worked with this system, and by 1843 he had identified ten triads, three groups of four, and one group of five.Jean Baptiste Dumas published work in 1857 describing relationships between various groups of metals. Although various chemists were able to identify relationships between small groups of elements, they had yet to build one scheme that encompassed them all. German chemist August KekulÃ© had observed in 1858 that carbon has a tendency to bond with other elements in a ratio of one to four. Methane, for example, has one carbon atom and four hydrogen atoms. This concept eventually became known as valency. In 1864, fellow German chemist Julius Lothar Meyer published a table of the 49 known elements arranged by valency.

The table revealed that elements with similar properties often shared the same valency. English chemist John Newlands published a series of papers in 1864 and 1865 that described his attempt at classifying the elements: When listed in order of increasing atomic weight, similar physical and chemical properties recurred at intervals of eight, which he likened to theoctaves of music. This law of octaves, however, was ridiculed by his contemporaries. Russian chemistry professor Dmitri Ivanovich Mendeleev and Julius Lothar Meyer independently published their periodic tables in 1869 and 1870, respectively. They both constructed their tables in a similar manner: by listing the elements in a row or column in order of atomic weight and starting a new row or column when the characteristics of the elements began to repeat. The success of Mendeleevâ€™s table came from two decisions he made: The first was to leave gaps in the table when it seemed that the corresponding element had not yet been discovered.

Mendeleev was not the first chemist to do so, but he went a step further by using the trends in his periodic table to predict the properties of those missing elements, such as gallium and germanium. The second decision was to occasionally ignore the order suggested by the atomic weights and switch adjacent elements, such as cobalt and nickel, to better classify them into chemical families. With the development of theories of atomic structure, it became apparent that Mendeleev had inadvertently listed the elements in order of increasing atomic number. With the development of modern quantum mechanical theories of electron configurations within atoms, it became apparent that each row (or period) in the table corresponded to the filling of a quantum shell of electrons. In Mendeleevâ€™s original table, each period was the same length. However, because larger atoms have more electron sub-shells, modern tables have progressively longer periods further down the table. In the years that followed after Mendeleev published his periodic table, the gaps he left were filled as chemists discovered more chemical elements. The last naturally occurring element to be discovered was francium (referred to by Mendeleev as eka-caesium) in 1939.

alcascience7a - 1.4 Periodic table of elements 1.4 Periodic table of elements Export (PDF) Groups A group or family is a vertical column in the periodic table. Groups are considered the most important method of classifying the elements. In some groups, the elements have very similar properties and exhibit a clear trend in properties down the group. These groups tend to be given trivial (unsystematic) names, e.g., the alkali metals , alkaline earth metals , halogens , pnictogens , chalcogens , and noble gases . Some other groups in the periodic table display fewer similarities and/or vertical trends (for example Group 14), and these have no trivial names and are referred to simply by their group numbers. Periods A period is a horizontal row in the periodic table. Although groups are the most common way of classifying elements, there are some regions of the periodic table where the horizontal trends and similarities in properties are more significant than vertical group trends. This can be true in the d-block (or " transition metals "), and especially for the f-block , where the lanthanides and actinides form two substantial horizontal series of elements.

Blocks This diagram shows the periodic table blocks Because of the importance of the outermost shell, the different regions of the periodic table are sometimes referred to as periodic table blocks , named according to the subshell in which the "last" electron resides. The s-block comprises the first two groups ( alkali metals and alkaline earth metals ) as well as hydrogen and helium . The p-block comprises the last six groups (groups 13 through 18) and contains, among others, all of the semimetals . The d-block comprises groups 3 through 12 and contains all of the transition metals . The f-block , usually offset below the rest of the periodic table, comprises the rare earth metals . Other The chemical elements are also grouped together in other ways. Some of these groupings are often illustrated on the periodic table, such as transition metals , poor metals , and metalloids . Other informal groupings exist, such as the platinum group and the noble metals taken from #Classification what is the periodic table of elements? The periodic table is the most important chemistry reference there is. It arranges all the known elements in an informative array. Elements are arranged left to right and top to bottom in order of increasing atomic number.

Order generally coincides with increasing atomic mass. The different rows of elements are called periods. The period number of an element signifies the highest energy level an electron in that element occupies (in the unexcited state). The number of electrons in a period increases as one traverses down the periodic table; therefore, as the energy level of the atom increases, the number of energy sub-levels per energy level increases. Using the data in the table scientists, students, and others that are familiar with the periodic table can extract information concerning individual elements. For instance, a scientist can use carbon's atomic mass to determine how many carbon atoms there are in a 1 kilogram block of carbon. People also gain information from the periodic table by looking at how it is put together. By examining an element's position on the periodic table, one can infer the electron configuration. Elements that lie in the same column on the periodic table (called a "group") have identical valance electron configurations and consequently behave in a similar fashion chemically. For instance, all the group 18 elements are inert gases. The periodic table contains an enormous amount of important information.

People familiar with how the table is put together can quickly determine a significant amount of information about an element, even if they have never heard of it. The periodic table of the chemical elements is a tabular display of the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior. The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize, and compare all of the many different forms of chemical behavior. The table has found wide application in chemistry, physics biology, and engineering, especially chemical engineering. The current standard table contains 118 elements as of March 2010. taken from: ​ Periodec table of the elements. The periodic table of the chemical elements (also Mendeleev's table, periodic table of the elements or just periodic table) is a tabular display of the chemical elements.

Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior. The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize, and compare all of the many different forms of chemical behavior. The table has found wide application in chemistry, physics, biology, and engineering, especially chemical engineering. The current standard table contains 117 elements as of July 2009 (elements 1–116 and element 118). The periodic table is the most important chemistry reference there is. It arranges all the known elements in an informative array. Elements are arranged left to right and top to bottom in order of increasing atomic number . Order generally coincides with increasing atomic mass. The different rows of elements are called periods. The period number of an element signifies the highest energy level an electron in that element occupies (in the unexcited state).

The number of electrons in a period increases as one traverses down the periodic table; therefore, as the energy level of the atom increases, the number of energy sub-levels per energy level increases. Using the data in the table scientists, students, and others that are familiar with the periodic table can extract information concerning individual elements. For instance, a scientist can use carbon's atomic mass to determine how many carbon atoms there are in a 1 kilogram block of carbon. People also gain information from the periodic table by looking at how it is put together. By examining an element's position on the periodic table, one can infer the electron configuration. Elements that lie in the same column on the periodic table (called a "group") have identical valance electron configurations and consequently behave in a similar fashion chemically. For instance, all the group 18 elements are inert gases. The periodic table contains an enormous amount of important information. People familiar with how the table is put together can quickly determine a significant amount of information about an element, even if they have never heard of it. · Atomic Number The number of protons in an atom defines what element it is. For example carbon atoms have six protons, hydrogen atoms have one, and oxygen atoms have eight.

The number of protons in an atom is referred to as the atomic number of that element. The number of protons in an atom also determines the chemical behavior of the element. · Atomic Symbol: The atomic symbol is one or two letters chosen to represent an element ("H" for "hydrogen," etc.). These symbols are used internationally. Typically, a symbol is the truncated name of the element or the truncated Latin name of the element. Click here for a list of the elements and their symbols. · Atomic Mass: The atomic mass is the average mass of an element in atomic mass units ("amu"). Though individual atoms always have an integer number of atomic mass units, the atomic mass on the periodic table is stated as a decimal number because it is an average of the various isotopes of an element. Isotopes can have a weight either more or less than the average. The average number of neutrons for an element can be found by subtracting the number of protons (atomic number) from the atomic mass. · Electron Configuration: The electron configuration is the orbital description of the locations of the electrons in an unexcited atom. Using principles of physics, chemists can predict how atoms will react based upon the electron configuration.

They can predict properties such as stability, boiling point, and conductivity. Typically, only the outermost electron shells matter in chemistry, so we truncate the inner electron shell notation by replacing the long-hand orbital description with the symbol for a noble gas in brackets. This method of notation vastly simplifies the description for large molecules. Example: The electron configuration for Be is 1s22s,2 but we write [He]2s2 where [He] is equivalent to all the electron orbitals in the helium atom. The Letters, s, p, d, and f designate the shape of the orbitals and the superscript gives the number of electrons in that orbital. Periodic Table is taken from : The periodic table of the chemical elements (also Mendeleev's table, periodic table of the elements or just periodic table) is a tabular display of the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring ("periodic") trends in the properties of the elements.

The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior.[[#cite_note-0|[1]]] The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize, and compare all of the many different forms of chemical behavior. The table has found wide application in chemistry, physics, biology, and engineering, especially chemical engineering. The current standard table contains 117 elements as of July 2009 (elements 1 – 116 and element 118 ). is taken for: .org Alchemical Symbols of the Elements The word alchemy comes from the Arabian al-kimia, referring to the preparation of 'Elixir' or the 'Stone' by the Egyptians. The Arabic kimia, in turn, comes from the Coptic khem, which referred to the fertile black Nile delta soil and also to the dark mystery of the primordial First Matter (the Khem). Do you recognize the origin of the word 'chemistry'? Although single symbols are presented here, there were often many symbols for an element.

For a time, the astronomical symbols of the planets were used to denote the elements. However, as alchemists came to be persecuted, particularly in medieval times, secret symbols were invented. This led to a great deal of confusion, so you will find some overlap of symbols. The symbols were in common use through the 17th century; some are still in use today. taken from: groups A group or family is a vertical column in the periodic table. Groups are considered the most important method of classifying the elements. In some groups, the elements have very similar properties and exhibit a clear trend in properties down the group. These groups tend to be given trivial (unsystematic) names, e.g., the alkali metals, alkaline earth metals, halogens, pnictogens, chalcogens, and noble gases. Some other groups in the periodic table display fewer similarities and/or vertical trends (for example Group 14), and these have no trivial names and are referred to simply by their group numbers. ​ periods A period is a horizontal row in the periodic table.

Although groups are the most common way of classifying elements, there are some regions of the periodic table where the horizontal trends and similarities in properties are more significant than vertical group trends. This can be true in the d-block (or "transition metals"), and especially for the f-block, where the lanthanides and actinides form two substantial horizontal series of elements. blocks Because of the importance of the outermost shell, the different regions of the periodic table are sometimes referred to as periodic table blocks, named according to the subshell in which the "last" electron resides. The s-block comprises the first two groups (alkali metals and alkaline earth metals) as well as hydrogen and helium. The p-block comprises the last six groups (groups 13 through 18) and contains, among others, all of the semimetals. The d-block comprises groups 3 through 12 and contains all of the transition metals. The f-block, usually offset below the rest of the periodic table, comprises the rare earth metals.

taken from:http: en.wikipedia.org/wiki/Periodic_table#Classification File:PTable structure.png The periodic table of the elements classifies, organizes and distributes the different chemical elements, in conformity with his(her,your) properties and characteristics. One is in the habit of attributing the table to Dimitri Mendeleiev, who arranged the elements being based on the manual variation of the chemical properties, though Julius Lothar Meyer, working separately, carried out a classification from the physical properties of the atoms. video tablaperiodica.jpg taken form: [[ ódica_de_los_elementos]] Periodic Table the periodic table the elements are not randomly located there are several rules to organize the elements 1.regions Group 16 (VIA) Chalcogen or chalcogens Group 17 (VIIA) Halogen Group 18 (VIIIA) Noble gases 2.Period In the periodic table of elements, a period is each row of the table. The number of energy levels an atom has determines the period to which it belongs.

Each level is divided into various sub-levels, that with increasing atomic number are filling in this order 3.The Blocks: are named after the letter refers to the outermost orbital: s, p, d and f Could have more elements than other orbitals fill, but have not been synthesized or discovered, in this case is continued to name them alphabetically. Block s Block f Block g Block s:The elements of the block s (to have their valence electrons in the s) are those that lie in groups 1 and 2 of the periodic table of elements. In these elements the outermost energy level corresponds to orbital s. Block P: P block elements (for having their valence electrons in the orbital p) are those located in groups 13 to 18 of the periodic table of elements. In these elements the outermost energy level corresponds to p orbitals. Block D : D block elements (for having electrons in the orbital d) are those that lie in groups 3 to 12 in the periodic table of elements. In these elements the outermost energy level corresponds to d orbitals.

Block f: F block elements (for having their valence electrons in the orbital f) are two series, one starting from the element lanthanum and actinium from another, so the elements of these series are called lanthanides and actinides. Although the periodic table of elements would have to be after these two elements represent are usually separated from the rest. Also known as rare earths. Block G: The elements of the block g represent a hypothetical group, unobserved, of elements that would be beyond the already discovered transuranic elements, and where would deal a new orbit. the elements have properties which are also organized Periodic table of the elements The periodic table of the chemical elements is a tubular display of the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior. Classification Groups A group or family is a vertical column in the periodic table.

Groups are considered the most important method of classifying the elements. In some groups, the elements have very similar properties and exhibit a clear trend in properties down the group. These groups tend to be given trivial names, e.g., the alkali metals, alkaline earth metals, halogens, pcnitogens, chalcogens, and noble gases. Some other groups in the periodic table display fewer similarities and/or vertical trends , and these have no trivial names and are referred to simply by their group numbers. Periods A period is a horizontal row in the periodic table. Although groups are the most common way of classifying elements, there are some regions of the periodic table where the horizontal trends and similarities in properties are more significant than vertical group trends. This can be true in thedblock , and especially for the f block, where the lanthanides and actinides form two substantial horizontal series of elements. Blocks Because of the importance of the outermost shell, the different regions of the periodic table are sometimes referred to as periodic tables block, named according to the subshell in which the "last" electron resides. The s block comprises the first two groups as well as hydrogen and helium.

The p block comprises the last six groups and contains, among others, all of the semimetals. The d block comprises groups 3 through 12 and contains all of the transition metals. The f block, usually offset below the rest of the periodic table, comprises the rare earth metals Other The chemical elements are also grouped together in other ways. Some of these groupings are often illustrated on the periodic table, such as transition metals, poor metals, and metalloids. Other informal groupings exist, such as the platinium group and the noble metals. TAKEN FROM: Element 112 likely to be named copernicium: proposed name honours astronomer Nicolaus Copernicus In honour of scientist and astronomer Nicolaus Copernicus (1473-1543), the discovering team around Professor Sigurd Hofmann suggested the name copernicium with the element symbol Cn (original suggestion was Cp) for the new element 112, discovered at the GSI Helmholtzzentrum für Schwerionenforschung (Center for Heavy Ion Research) in Darmstadt.

It was Copernicus who discovered that the Earth orbits the Sun, thus paving the way for our modern view of the world. Thirteen years ago, element 112 was discovered by an international team of scientists at the GSI accelerator facility. A few weeks ago, the International Union of Pure and Applied Chemistry, IUPAC, officially confirmed their discovery. In around six months (Dec 2009 - Jan 2010?), IUPAC will officially endorse the new element's name, or not. This period is set to allow the scientific community to discuss the suggested name copernicium before the IUPAC naming. Greyhound Chromatography Download a free A3 Poster of the Periodic Table. The periodic table of the chemical elements (also periodic table of the elements) is a tabular display of the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring periodic trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behaviour.

Over 70 single element standards of the Periodic Table are available from High Purity Inc; supplied by Greyhound Chromatography and Allied Chemicals. Concentrations include both 1000 and 10.00 in aqueous solution, (unless otherwise noted). Most standards are packaged in 50,100, 250 and 500 mL HDPE or LDPE laboratory grade bottles. The density is provided on the Certificate of Analysis as additional information for the user. Customised mixtures can be made to the customers specific requirements. Reference Standards are supplied to Guide 34. The accuracy of all standards is verified against NIST Spectrometric Standard Solutions. A certificate of Analysis and Safety Data Sheet are included with each standard. Standards are certified accurate for a period of 18 months from the date of shipment unless stated otherwise on the Certificate of Analysis. The periodic table is now ubiquitous within the academic discipline of chemistry, providing a useful framework to classify, systematise, and compare all of the many different forms of chemical behaviour. The table has found many applications in chemistry, physics, biology, and engineering, especially chemical engineering.

In 1789, Antoine Lavoisier published a list of 33 chemical elements. Although Lavoisier grouped the elements into gases, metals, non-metals, and earths, chemists spent the following century searching for a more precise classification scheme. In 1829, Johann Wolfgang Döbereiner observed that many of the elements could be grouped into triads (groups of three) based on their chemical properties. Lithium , sodium , and potassium , for example, were grouped together as being soft, reactive metals. Döbereiner also observed that, when arranged by atomic weight, the second member of each triad was roughly the average of the first and the third. This became known as the Law of triads. German chemist Leopold Gmelin worked with this system, and by 1843 he had identified ten triads, three groups of four, and one group of five. Jean Baptiste Dumas published work in 1857 describing relationships between various groups of metals. Although various chemists were able to identify relationships between small groups of elements, they had yet to build one scheme that encompassed them all.

German chemist August Kekulé had observed in 1858 that carbon has a tendency to bond with other elements in a ratio of one to four. Methane, for example, has one carbon atom and four hydrogen atoms. This concept eventually became known as valency. In 1864, fellow German chemist Julius Lothar Meyer published a table of the 49 known elements arranged by valency. The table revealed that elements with similar properties often shared the same valency. Of the 94 naturally occurring elements, those with atomic numbers 1 through 40 are all considered to be stable isotopes. Elements with atomic numbers 41 through 82 are apparently stable (except technetium and promethium) but theoretically unstable, or radioactive. The half lives of elements 41 through 82 are so long however that their radioactive decay has yet to be detected by experiment. These theoretical radionuclides have half lives at least 100 million times longer than the estimated age of the universe. Elements with atomic numbers 83 through 94 are unstable to the point that their radioactive decay can be detected.

Some of these elements, notably thorium (atomic number 90) and uranium (atomic number 92), have one or more isotopes with half lives long enough to survive as remnants of the explosive stellar nucleosynthesis that produced the heavy elements before the formation of our solar system. For example, at over 1.9×1019 years, over a billion times longer than the current estimated age of the universe, bismuth -209 (atomic number 83) has the longest known alpha decay half life of any naturally occurring element. The very heaviest elements (those beyond plutonium, atomic number 94) undergo radioactive decay with half lives so short that they have only been observed as the result of experimental observation. Apart from the hydrogen and helium in the universe, which are thought to have been mostly produced in the Big Bang, the chemical elements are thought to have been produced by one of two later processes—either cosmic ray spallation (important for lithium , beryllium and boron ), or stellar nucleosynthesis (which produces all elements heavier than boron ).

Oxygen is the most abundant element in the Earth's crust, making up almost half of its mass Relatively small amounts of elements continue to be produced on Earth as products of natural transmutation processes. This includes production by cosmic rays or other nuclear reactions (see cosmogenic and nucleogenic nuclides), or as decay products of long-lived primordial nuclides. English chemist John Newlands produced a series of papers in 1864 and 1865 that described his own classification of the elements: he noted that when listed in order of increasing atomic weight, similar physical and chemical properties recurred at intervals of eight, which he likened to the octaves of music. This law of octaves, however, was ridiculed by his contemporaries and the Chemical Society refused to publish his work. Nonetheless, Newlands was able to draft an atomic table and use it to predict the existence of missing elements, such as germanium. Russian chemistry professor Dmitri Ivanovich Mendeleev and Julius Lothar Meyer independently published their periodic tables in 1869 and 1870, respectively.

They both constructed their tables in a similar manner: by listing the elements in a row or column in order of atomic weight and starting a new row or column when the characteristics of the elements began to repeat. The success of Mendeleev's table came from two decisions he made: The first was to leave gaps in the table when it seemed that the corresponding element had not yet been discovered. Mendeleev was not the first chemist to do so, but he was the first to be recognised as using the trends in his periodic table to predict the properties of those missing elements, such as gallium and germanium . The second decision was to occasionally ignore the order suggested by the atomic weights and switch adjacent elements, such as cobalt and nickel , to better classify them into chemical families. With the development of theories of atomic structure, it became apparent that Mendeleev had listed the elements in order of increasing atomic number. New elements have been proposed in recent years; Scientists have put forward their suggested names for the newest additions to the Periodic Table.

If the names are accepted, element 114 will become Flerovium (Fl) in honour of the physicist Georgiy Flerov.While element 116 will become Livermorium (Lv), after the Californian laboratory where it was discovered.The table's governing body will officially endorse the names in five month's time, 10 years after the elements were discovered.The newest elements were among a handful of elements put forward for inclusion in the table in recent years. They were accredited in June this year after a three year review by the International Union of Pure and Applied Chemistry (IUPAC) and the International Union of Pure and Applied Physics (IUPAP).The other putative heavy elements, 113, 115, and 118, are still under review.Scientists at Lawrence Livermore National Laboratory (LLNL), in collaboration with a team at the Flerov Laboratory of Nuclear Reactions in Dubna, Russia, discovered the newest additions to the periodic table by smashing calcium ions into the element curium to create element 116, which quickly decays to element 114.

The teams also created element 114 separately by replacing curium with a plutonium target.IUPAC will officially accept the proposed names after giving the public time to comment on the discoverers' choice. Element 115 may have been discovered Evidence for new element Ununpentium may swell Periodic Table. The atom, which has an atomic number of 115, is one of the heaviest chemical elements detected to date and does not occur naturally. Instead scientists had to synthesis it in the laboratory by bombarding a film of another heavy element known as americium with calcium ions. The resulting element lasted for just a fraction of a second before it decaying into more commonly found elements. Although it has yet to be officially named, Element 115 has the temporary name of ununpentium. Conspiracy theorists have in the past claimed that ununpentium was part of technology used by UFOs and it has also featured heavily in computer games as a source for weapons. However, in reality the uses for the new element, which is highly unstable and so short lived, are likely to be extremely limited. The new findings must now be assessed by a panel of international experts who will decide whether it can be included in the periodic table.

Ununpentium is one of a number of elements that were theoretically thought to exist. It was first created in 2004 by a team of Russian and American scientists but the evidence was deemed insufficient for it to be officially classified as a new element. The latest experiments to prove the existence of Element 115 were conducted at Lund University in Sweden. Professor Dirk Rudolph, who led the work at the division of atomic physics at Lund University, said he hoped it would now allow the element to be included in the periodic table. Their findings are published in the journal Physical Review Letters. He said: "This was a very successful experiment and is one of the most important in the field in recent years. "There are three isotopes of element 115 thought to be known or observed: Those with 172, 173, and 174 neutrons in the nucleus - 287-115, 288-115 and 289-115.

"Based on the data from the 288-115 nuclei, this isotope has a half-life of 160 milliseconds." The researchers were able to detect Element 115 by looking for a distinctive fingerprint in the X-ray radiation it gave off. New elements are assessed by members of the International Union of Pure and Applied Chemistry and the International Union of Pure and Applied Physics. In 2011 they approved the names of three new elements that have the atomic numbers 110, 111 and 112. These were named darmstadtium (Ds), roentgenium (Rg) and copernicium (Cn). The most recently approved element was Livermorium, which has the atomic number 116 and had its name adopted in May 2012.

(Source: Element 115 : Daily Telegraph 28th August 2013) Giant IUPAC Periodic Table of the Elements Poster | Zazzle Giant IUPAC Periodic Table of the Elements Poster $97.55 30% off with code SURPRISEDEAL  30% Off Sitewide | Use Code: SURPRISEDEAL | Ends Thursday | See Details Sold by  About this product Paper Type: Poster Paper (Semi-Gloss) Your walls are a reflection of your personality. So let them speak with your favorite quotes, art, or designs printed on our posters! Choose from up to 5 unique paper types and several sizes to create art that’s a perfect representation of you. 53 lb., 7.9 point thick poster paper Recommended for large-format posters More paper types available under "Paper Options" Add a premium quality frame as an essential accessory available on 31 products Giant IUPAC Periodic Table of the Elements Poster The periodiс table of the chemical elements (also Mendeleev's table, periodic table of the elements or just periodic table) is a tabular display of the chemical elements.

Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior. The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize, and compare all of the many different forms of chemical behavior. The table has found wide application in chemistry, physics, biology, and engineering, especially chemical engineering. The current standard table contains 117 elements as of July 2009 In 1789, Antoine Lavoisier published a list of 33 chemical elements. Although Lavoisier grouped the elements into gases, metals, non-metals, and earths, chemists spent the following century searching for a more precise classification scheme. In 1829, Johann Wolfgang Döbereiner observed that many of the elements could be grouped into triads (groups of three) based on their chemical properties.

Lithium, sodium, and potassium, for example, were grouped together as being soft, reactive metals. Döbereiner also observed that, when arranged by atomic weight, the second member of each triad was roughly the average of the first and the third. This became known as the Law of triads.[citation needed] German chemist Leopold Gmelin worked with this system, and by 1843 he had identified ten triads, three groups of four, and one group of five. Jean Baptiste Dumas published work in 1857 describing relationships between various groups of metals. Although various chemists were able to identify relationships between small groups of elements, they had yet to build one scheme that encompassed them all. German chemist August Kekulé had observed in 1858 that carbon has a tendency to bond with other elements in a ratio of one to four. Methane, for example, has one carbon atom and four hydrogen atoms. This concept eventually became known as valency. In 1864, fellow German chemist Julius Lothar Meyer published a table of the 49 known elements arranged by valency.

The table revealed that elements with similar properties often shared the same valency. English chemist John Newlands published a series of papers in 1864 and 1865 that described his attempt at classifying the elements: When listed in order of increasing atomic weight, similar physical and chemical properties recurred at intervals of eight, which he likened to the octaves of music. This law of octaves, however, was ridiculed by his contemporaries.[8] Portrait of Dmitri MendeleevRussian chemistry professor Dmitri Ivanovich Mendeleev and Julius Lothar Meyer independently published their periodic tables in 1869 and 1870, respectively. They both constructed their tables in a similar manner: by listing the elements in a row or column in order of atomic weight and starting a new row or column when the characteristics of the elements began to repeat. The success of Mendeleev's table came from two decisions he made: The first was to leave gaps in the table when it seemed that the corresponding element had not yet been discovered.

Mendeleev was not the first chemist to do so, but he went a step further by using the trends in his periodic table to predict the properties of those missing elements, such as gallium and germanium. The second decision was to occasionally ignore the order suggested by the atomic weights and switch adjacent elements, such as cobalt and nickel, to better classify them into chemical families. With the development of theories of atomic structure, it became apparent that Mendeleev had inadvertently listed the elements in order of increasing atomic number. With the development of modern quantum mechanical theories of electron configurations within atoms, it became apparent that each row (or period) in the table corresponded to the filling of a quantum shell of electrons. In Mendeleev's original table, each period was the same length. However, because larger atoms have more electron sub-shells, modern tables have progressively longer periods further down the table. In the years that followed after Mendeleev published his periodic table, the gaps he left were filled as chemists discovered more chemical elements. The last naturally-occurring element to be discovered was Francium (referred to by Mendeleev as eka-caesium) in 1939.

The periodic table has also grown with the addition of synthetic and transuranic elements.

The first transuranic element to be discovered was neptunium, which was formed by bombarding uranium with neutrons in a cyclotron in 1939 "Periodic Table of Elements" Periodic Table of Elements Dmitri Mendeleev Antoine Lavoisier Chemist Chemicals Chemistry Physics Lab Laboratory Experiment Experiments Chart Poster August Kekulé Organic Physical Analytical Biochemist Biochemistry Biochemical Biological Biology Biologist Compound Compounds Molecule Molecular Mole Avogadro Formula Symbol "Chemical Symbol" Atom Atomic "Atomic Weight" Proton Neutron Electron Deuterium Tritium Isotope Isomer Molarity Radioactive Nucleus Orbital Spin Quantum Row Period Actinium Aluminum Americium Antimony Argon Arsenic Astatine Barium Berkelium Beryllium Bismuth Bohrium Boron Bromine Cadmium Calcium Californium Carbon Cerium Cesium Chlorine Chromium Cobalt Copper Curium Darmstadtium Dubnium Dysprosium Einsteinium Erbium Europium Fermium Fluorine Francium Gadolinium Gallium Germanium Gold Hafnium Hassium Helium Holmium Hydrogen Indium Iodine Iridium Iron Krypton Lawrencium Lead Lithium Lutet

ium Magnesium Manganese Meitnerium Mendelevium Mercury Molybdenum Neodymium Neon Neptunium Nickel Niobium Nitrogen Nobelium Osmium Oxygen Palladium Phosphorus Platinum Plutonium Polonium Potassium Praseodymium Promethium Protactinium Radium Radon Rhenium Rhodium Rubidium Ruthenium Rutherfordium Samarium Scandium Seaborgium Selenium Silicon Silver Sodium Strontium Sulfur Tantalum Technetium Tellurium Terbium Thallium Thorium Thulium TinTitanium Tungsten Ununbium Ununnilium Ununumium Uranium Vanadium Xenon Ytterbium Yttrium Zinc Zirconium

Question: What is a tabular display of the chemical elements, the invention of which is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring trends in the properties of the elements?
Answer: Periodic table