Group 11 element - wikipedia Group 11 element This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. ( April 2013 ) Group 11 in the periodic table Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury ( element ) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson group 10 ← → group 12 IUPAC group number 11 Name by element copper group Trivial name coinage metals CAS group number ( US, pattern A-B-A ) IB old IUPAC number ( Europe, pattern A-B ) IB ↓ Period Copper ( Cu ) 29 Transition metal 5 Silver ( Ag ) 47 Transition metal 6 Gold ( Au ) 79 Transition metal 7 Roentgenium ( Rg ) 111 unknown chemical properties Legend primordial element synthetic element Atomic number color : black = solid Group 11, by modern IUPAC numbering, is a group of chemical elements in the periodic table, consisting of copper ( Cu ), silver ( Ag ), and gold ( Au ). Roentgenium ( Rg ) is also placed in this group in the periodic table, although no chemical experiments have yet been carried out to confirm that it behaves like the heavier homologue to gold. Group 11 is also known as the coinage metals, due to their former usage. They were most likely the first three elements discovered. Copper, silver, and gold all occur naturally in elemental form. Contents 1 History 2 Characteristics 3 Occurrence 4 Production 5 Applications 6 Biological role and toxicity 7 References 8 See also History All the elements of the group except roentgenium have been known since prehistoric times, as all of them occur in metallic form in nature and no extraction metallurgy is necessary to produce them. Characteristics Like other groups, the members of this family show patterns in electron configuration, especially in the outermost shells, resulting in trends in chemical behavior, although roentgenium is probably an exception : Z Element No. of electrons / shell 29 copper 2, 8, 18, 1 47 silver 2, 8, 18, 18, 1 79 gold 2, 8, 18, 32, 18, 1 111 roentgenium 2, 8, 18, 32, 32, 17, 2 ( predicted ) All Group 11 elements are relatively inert, corrosion - resistant metals. Copper and gold are colored. These elements have low electrical resistivity so they are used for wiring. Copper is the cheapest and most widely used. Bond wires for integrated circuits are usually gold. Silver and silver - plated copper wiring are found in some special applications. Occurrence Copper occurs in its native form in Chile, China, Mexico, Russia and the USA. Various natural ores of copper are : copper pyrites ( CuFeS ), cuprite or ruby copper ( Cu O ), copper glance ( Cu S ), malachite, ( Cu ( OH ) CuCO ), and azurite ( Cu ( OH ) 2CuCO ). Copper pyrite is the principal ore, and yields nearly 76 % of the world production of copper. Production Silver is found in native form, as an alloy with gold ( electrum ), and in ores containing sulfur, arsenic, antimony or chlorine. Ores include argentite ( Ag S ), chlorargyrite ( AgCl ) which includes horn silver, and pyrargyrite ( Ag SbS ). Silver is extracted using the Parkes process. Applications These metals, especially silver, have unusual properties that make them essential for industrial applications outside of their monetary or decorative value. They are all excellent conductors of electricity. The most conductive of all metals are silver, copper and gold in that order. Silver is also the most thermally conductive element, and the most light reflecting element. Silver also has the unusual property that the tarnish that forms on silver is still highly electrically conductive. Copper is used extensively in electrical wiring and circuitry. Gold contacts are sometimes found in precision equipment for their ability to remain corrosion - free. Silver is used widely in mission - critical applications as electrical contacts, and is also used in photography ( because silver nitrate reverts to metal on exposure to light ), agriculture, medicine, audiophile and scientific applications. Gold, silver, and copper are quite soft metals and so are easily damaged in daily use as coins. Precious metal may also be easily abraded and worn away through use. In their numismatic functions these metals must be alloyed with other metals to afford coins greater durability. The alloying with other metals makes the resulting coins harder, less likely to become deformed and more resistant to wear. Gold coins : Gold coins are typically produced as either 90 % gold ( e.g. with pre-1933 US coins ), or 22 carat ( 91.66 % ) gold ( e.g. current collectible coins and Krugerrands ), with copper and silver making up the remaining weight in each case. Bullion gold coins are being produced with up to 99.999 % gold ( in the Canadian Gold Maple Leaf series ). Silver coins : Silver coins are typically produced as either 90 % silver -- in the case of pre 1965 US minted coins ( which were circulated in many countries ), or sterling silver ( 92.5 % ) coins for pre-1920 British Commonwealth and other silver coinage, with copper making up the remaining weight in each case. Old European coins were commonly produced with 83.5 % silver. Modern silver bullion coins are often produced with purity varying between 99.9 % to 99.999 %. Copper coins : Copper coins are often of quite high purity, around 97 %, and are usually alloyed with small amounts of zinc and tin. Inflation has caused the face value of coins to fall below the hard currency value of the historically used metals. This had led to most modern coins being made of base metals -- copper nickel ( around 80 : 20, silver in color ) is popular as are nickel - brass ( copper ( 75 ), nickel ( 5 ) and zinc ( 20 ), gold in color ), manganese - brass ( copper, zinc, manganese, and nickel ), bronze, or simple plated steel. Biological role and toxicity This section needs expansion. You can help by adding to it. ( February 2012 ) Copper, although toxic in excessive amounts, is essential for life. Copper is shown to have antimicrobial properties which make it useful for hospital doorknobs to keep diseases from being spread. Eating food in copper containers is known to increase the risk of copper toxicity. Elemental gold and silver have no known toxic effects or biological use, although gold salts can be toxic to liver and kidney tissue. Like copper, silver also has antimicrobial properties. The prolonged use of preparations containing gold or silver can also lead to the accumulation of these metals in body tissue ; the results are the irreversible but apparently harmless pigmentation conditions known as chrysiasis and argyria respectively. Due to being short lived and radioactive, roentgenium has no biological use but it is likely extremely harmful due to its radioactivity. References Jump up ^ Fluck, E. ( 1988 ). `` New Notations in the Periodic Table '' ( PDF ). Pure Appl. Chem. IUPAC. 60 ( 3 ) : 431 -- 436. doi : 10.1351 / pac198860030431. Retrieved 24 March 2012. Jump up ^ Greenwood, Norman N. ; Earnshaw, Alan ( 1997 ). Chemistry of the Elements ( 2nd ed. ). Butterworth - Heinemann. p. 1173. ISBN 0 - 08 - 037941 - 9. Jump up ^ Wright, I.H. ; Vesey, C.J. ( 1986 ). `` Acute poisoning with gold cyanide ''. Anaesthesia. 41 ( 79 ) : 936 -- 939. doi : 10.1111 / j. 1365 - 2044.1986. tb12920. x. PMID 3022615. Jump up ^ Wu, Ming - Ling ; Tsai, Wei - Jen ; Ger, Jiin ; Deng, Jou - Fang ; Tsay, Shyh - Haw ; Yang, Mo - Hsiung. ( 2001 ). `` Cholestatic Hepatitis Caused by Acute Gold Potassium Cyanide Poisoning ''. Clinical Toxicology. 39 ( 7 ) : 739 -- 743. doi : 10.1081 / CLT - 100108516. PMID 11778673. See also Periodic table ( Large cells ) 5 6 7 8 9 10 11 12 13 14 15 16 17 18 He Li Be Ne Na Mg Al Si Cl Ar Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 5 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te Xe 6 Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn 7 Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og Alkali metal Alkaline earth metal Lanthanide Actinide Transition metal Post - ​ transition metal Metalloid Polyatomic nonmetal Diatomic nonmetal Noble gas Unknown chemical properties Periodic table Periodic table forms Standard 18 - column 18 - column, large cells 32 - column, large cells Alternative Alternatives Chemical Galaxy Janet 's left step table Extended Extension beyond the 7th period Fricke model large cells Pyykkö model Sets of elements By periodic table structure Groups 1 ( Alkali metals ) 2 ( Alkaline earth metals ) 5 6 7 8 9 10 11 12 13 14 15 ( Pnictogens ) 16 ( Chalcogens ) 17 ( Halogens ) 18 ( Noble gases ) Periods 5 6 7 8 + Aufbau Fricke Pyykkö Blocks s - block p - block d - block f - block g - block Aufbau principle By metallicity Metals Alkali metals Alkaline earth metals Lanthanides Actinides Superactinides Transition metals Post-transition metals Metalloids Lists of metalloids by source Dividing line Nonmetals Polyatomic nonmetals Diatomic nonmetals Noble gases Other sets Nutritional elements Platinum - group metals ( PGM ) Rare - earth elements Refractory metals Precious metals Coinage metals Noble metal Heavy metals Native metals Transuranium elements Transactinide elements Major actinides Minor actinides Elements Lists By : Abundance ( in humans ) Atomic properties Nuclear stability Production Symbol Properties Atomic weight Crystal structure Electron affinity Electron configuration Electronegativity Allen Pauling Goldschmidt classification Maximum valence Data pages Abundance Atomic radius Boiling point Critical point Density Elasticity Electrical resistivity Electron affinity Electron configuration Electronegativity Hardness Heat capacity Heat of fusion Heat of vaporization Ionization energy Melting point Oxidation state Speed of sound Thermal conductivity Thermal expansion coefficient Vapor pressure History Element discoveries Mendeleev 's predictions Naming Etymology controversies places scientists in East Asia See also IUPAC nomenclature systematic element name Trivial name Dmitri Mendeleev Book Chemistry Portal Group 11 elements Copper Cu Atomic Number : 29 Atomic Weight : 63.546 Melting Point : 1357.75 K Boiling Point : 2835 K Specific mass : 8.96 g / cm Electronegativity : 1.9 Silver Ag Atomic Number : 47 Atomic Weight : 107.8682 Melting Point : 1234.15 K Boiling Point : 2435 K Specific mass : 10.501 g / cm Electronegativity : 2.2 Gold Au Atomic Number : 79 Atomic Weight : 196.966569 Melting Point : 1337.73 K Boiling Point : 3129 K Specific mass : 19.282 g / cm Electronegativity : 2.54 Roentgenium Rg Atomic Number : 111 Atomic Weight : ( 281 ) Melting Point : ? K Boiling Point : ? K Specific mass : ? 28.7 g / cm Electronegativity : ? Retrieved from `` https://en.wikipedia.org/w/index.php?title=Group_11_element&oldid=814038686 '' Categories : Groups ( periodic table ) Currency production Hidden categories : Articles needing additional references from April 2013 All articles needing additional references Articles to be expanded from February 2012 All articles to be expanded Articles using small message boxes Talk Contents About Wikipedia Aragonés Asturianu Azərbaycanca বাংলা Български Bosanski Català Čeština Cymraeg Dansk Deutsch Español Esperanto Euskara فارسی Français Galego 한국어 हिन्दी Íslenska Italiano עברית Kiswahili Lumbaart Māori Bahasa Melayu Nederlands 日本 語 Norsk Norsk nynorsk ਪੰਜਾਬੀ Polski Português Русский Shqip Simple English Slovenčina Slovenščina Soomaaliga Српски / srpski Suomi Svenska தமிழ் ไทย Українська Tiếng Việt 中文 39 more Edit links This page was last edited on 6 December 2017, at 15 : 32. 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Question: what does cu on the periodic table mean
Answer: copper