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Word Count: 318
Xenon is a rare colorless odorless tasteless chemically unreactive gas It is one of the inert gas elements found in group 0 of the periodic table Xenon was long considered incapable of chemical reaction but in 1962 Neil Bartlett a Canadian chemist reported synthesis of xenon hexafluoroplatinate XePtF6 a true compound Before 1962 people thought that xenon and other noble gases were unable to form compounds Now xenons reported compounds are sodium perxenate xenon deutetrate xenon hydrate difluoride tetrafluride and hexafluoride Xenon is present in the atmosphere in extremely low concentration about one part in 20 million It is obtained commercially from liquid air Xenon is used in certain photographic flash lamps in high-intensity arc lamps for motion picture projection and in high-pressure arc lamps to produce ultraviolet light It is used in numerous instruments for radiation detection eg neutron and X-ray counters and bubble chambers It has found some use in medicine eg as an experimental anesthetic Naturally occurring xenon is a mixture of 9 stable isotopes 20 short-lived radioactive isotopes are also known A mixture of stable and unstable isotopes of xenon is produced in nuclear reactors during neutron fission of uranium one of these xenon-135 is a very good neutron absorber and must be removed since it poisons the reaction Xenon was discovered spectroscopically in 1898 by William Ramsay and M W Travers who obtained it by fractional distillation of an impure sample of krypton Xenon as well as the other noble gasses require an incredible amount of pressure for them to react which makes them very inert since such a large amount of pressure does not occur naturally FactoidsSymbol Xe Atomic Number 54 Mass 13129 Melting Point -1119 C Boiling Point -1081 C Number of ProtonsElectrons 54 Number of Neutrons 77 Classification Noble Gas Crystal Structure Cubic Density 293 K 58971 gcm3 Color Colorless GasDate of Discovery 1898 Discoverer Sir William Ramsay Name Origin From the Greek word xenon stranger
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