Relative atomic mass: 131.293 +- 0.006

English: Xenon
French: Xenon
Croatian: Ksenon
German: Xenon
Italian: Xeno
Spanish: Xenon

Atomic number: 54
Group numbers: 18
Period: 5
Standard state (20 oC): gas

Discovery: 1898 Sir William Ramsay, Morris William Travers (GB)
Xenon was discovered by Sir William Ramsay and Morris William Travers (GB) in 1898. The origin of the name comes from the Greek word xenos meaning stranger. It is a heavy, colourless, odourless, noble gas that reacts only with fluorine. Xenon is obtain from the small quantities in liquid air. It is used for filling flash lamps and other powerful lamps. Electrical excitation of xenon produces a burst of brilliant white light. It is also used in bubble chambers and modern nuclear power reactors. The price of 99.995 % pure xenon gas costs 266.50 /dm3 in small quantities (1 dm3) and about 10.62 /dm3 in large quantities (300 dm3).
Electronic configuration: [Kr] 4d10 5s2 5p6
Formal oxidation number: 0
Atomic radius: 216 pm

Electronegativities: 2.6
Thermal conductivity: 0.0056 W/(m K)
Electrical resistivity (20 oC): - microOhm cm

Melting point: -111.75 oC
Boiling point: -108.0 oC

Heat of fusion: 3.1 kJ/mol
Heat of vaporization: 12.65 kJ/mol
Heat of atomization: 0 kJ/mol

53I <= 54Xe => 55Cs

ASCII Periodic Table of the Elements
6 Jan. 2020
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