Two samples of an element that consists of more than one isotope, collected from two widely spaced sources on Earth, are expected to have slightly different relative atomic masses. This is because the proportions of each isotope are slightly different at different locations.
A standard atomic weight is the mean value of relative atomic masses of a number of normal samples of the element. Standard atomic weight values are published at regular intervals by the Commission on Isotopic Abundances and Atomic Weights of the International Union of Pure and Applied Chemistry (IUPAC). The standard atomic weight for each element is on the periodic table.
Often, the term relative atomic mass is used to mean standard atomic weight. This is not quite correct, because relative atomic mass is a less specific term that refers to individual samples. Individual samples of an element could have a relative atomic mass different to the standard atomic weight for the element. For example, a sample from another planet could have a relative atomic mass very different to the standard Earth-based value.
Relative atomic mass is not the same as:
Rodrigo López
Roderigo López (1525 – June 7, 1594) was a physician of Portuguese background. He was tried and executed for trying to poison Elizabeth I. He is believed to be the inspiration for Shakespeare's character Shylock in "The Merchant of Venice".
López was born into a family of Jewish origin in Portugal. He graduated from university with a degree in medicine. He went to England where he was appointed chief physician to Elizabeth I in 1586. He knew powerful men at court, and grew rich and respected. He was involved in various court intrigues until convicted of plotting to poison the Queen. He was hanged, drawn and quartered.
Several contemporaries make reference to the trial and execution. Christopher Marlowe mentions it in "Doctor Faustus" as do Thomas Dekker in "Whore of Babylon" and Thomas Middleton in "A Game at Chess". It is possible that Shylock in Shakespeare's "The Merchant of Venice" was inspired by López. my dads bald
Queen Elizabeth I’s physician, Roderigo Lopez, was tried and executed for allegedly plotting to kill the queen in 1594. As a Portuguese double agent, ‘Doctor Lopez a Jew’ was said to have conspired with the Spanish, England’s enemies at that time. He was accused of attempting to kill the Portuguese King Antonio and ‘take away Queene Elizabeths life by poyson’, in return for ‘fifty thousand Crowns’
Arletty
Arletty (15 May 1898 – 24 July 1992) was a French actress, singer, and model. She played Garance in the French movie "Les Enfants du Paradis".
Les Enfants du Paradis
Les Enfants du Paradis ("Children of Paradise") is a French romantic drama movie. It was directed by Marcel Carné and released in 1945. It stars Arletty as French courtesan Garance. She is loved by four men: a street mime, an actor, a criminal, and an aristocrat. The story is set among the lower class theatres of Paris between 1820 and 1840. Garance is courted by four men but leaves them all because they will not allow her to love in her own way. The three hour film has been described as France's "Gone with the Wind".
Dave Dryden
David Murray "Sod" Dryden (born September 5, 1941 in Hamilton, Ontario) is a Canadian retired ice hockey goaltender. Dryden was known for the distinction of creating (as well as being the first goaltender to employ) the modern day goaltending mask consisting of a fiberglass mask with a cage.
Before playing in the NHL, Dryden played 2 seasons in the OHA playing for the Toronto St. Michael's.
In the NHL, he played for the New York Rangers, Chicago Black Hawks, Buffalo Sabres and Edmonton Oilers. Dryden faced his brother Ken in a game between his Sabres and the Montreal Canadiens. It was the only time in the history of the NHL that brothers opposed each other as goalies.
Dryden was the goalie against whom Wayne Gretzky scored his first professional goal. During his time in the WHA, he played for the Chicago Cougars and Edmonton Oilers. He won the Ben Hatskin Trophy as the WHA's top goaltender, and the Gordie Howe Trophy as league MVP.
Since retiring from playing professional ice hockey in 1979, he became the chair person of Sleeping Children Around the World charity which was founded by his father and provides bed kits to children in developing countries.
Michel Dumas
Michel Joseph Dumas (born July 8, 1949) is a Canadian retired professional ice hockey goaltender. He currently works as a chief amateur scout for the Chicago Blackhawks.
Before playing in the NHL, Dumas played 2 games with the Oklahoma City Blazers and 3 seasons with the Dallas Black Hawks of the CHL. He also played 2 seasons in the IHL with the Dayton Gems.
He was called up to play for the Chicago Black Hawks for 3 games and went back down to the play 1 season for the Dallas Black Hawks again. He was called up again by the Black Hawks but he only played 5 games as his career was cut short due to an eye injury he suffered in a game against the Colorado Rockies in 1976.
He was hired by the Black Hawks tin 1977 to be an amateur scout, and was then promoted to be their chief amateur scout in the 1992–93 season.
IPad Air
The iPad Air is the fifth type of iPad made by Apple Inc. It was announced at the Yerba Buena Center for the Arts on October 22, 2013. It first came with iOS 7 installed on it and was upgraded to other versions later. The iPad Air contains the 64-bit Apple A7 processor and another M7 coprocessor. Apple released the iPad Air on November 1, 2013. Sadly, it can’t support iPadOS.
The iPad Air is 7.5 millimeters thick, which is thinner than both the iPad 2 and the iPad Mini. It has a smaller screen bezel which looks like the one on the iPad Mini. However, it still uses the same 9.7-inch Retina Display as the previous iPad model.
Its successor, the iPad Air 2, was announced on October 16, 2014.
The iPad Air can run iOS 12. It can act as a mobile hotspot, sharing its internet connection over Wifi, USB, or Bluetooth. It can have access to the App Store, where users can buy and download mobile applications onto their device.
Universal Mobile Telecommunications System
The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks. It is based on the GSM standard and is part of the International Telecommunications Union IMT-2000 standard set. UMTS is developed and maintained by the 3GPP (3rd Generation Partnership Project). It uses wideband code division multiple access (W-CDMA) radio access technology so that users can transfer information faster.
Marinade
Marination is the process of soaking foods in a liquid before cooking. The idea is to add flavour, and to tenderize tougher cuts of meat.
The liquid in question, the 'marinade', may be acidic (made with ingredients such as vinegar, lemon juice, or wine) or enzymatic (made with ingredients such as pineapple, papaya or kiwifruit). In addition to these ingredients, a marinade often contains oils, herbs, and spices to further flavour the food.
The process may last seconds or days. Different marinades are used in different cuisines. For example, in Indian cuisine the marinade is usually prepared with a mixture of blends.
Hôtel Ritz Paris
The Hôtel Ritz is a grand hotel in the heart of Paris in the Place Vendôme. The hotel is ranked highly among the most prestigious and luxurious hotels in the world and is a member of "The Leading Hotels of the World".
The hotel has 159 rooms. It was founded by the Swiss hotelier, César Ritz, in collaboration with the chef Auguste Escoffier in 1898. The new hotel was constructed behind the façade of a Town house from the 18th-century. It overlooks one of the central squares in Paris.