Xenon

Noble gas · atomic number 54

54131.2936XeXenonGasNoble gas

Xenon is a chemical element with symbol Xe and atomic number 54. It is a colorless, dense, odorless noble gas, that occurs in the Earth's atmosphere in trace amounts. Although generally unreactive, xenon can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized.

Properties of Xenon

Element category	Noble gas
Atomic number	54
Atomic mass	131.2936 u
Phase at STP	Gas
Group	18
Period	5
Block	p
Electron configuration	[Kr] 4d10 5s2 5p6
Electrons per shell	2, 8, 18, 18, 8
Electronegativity (Pauling)	2.6
Melting point	161.4 K (-112 °C)
Boiling point	165.051 K (-108 °C)
Density	5.894 g/L
Discovered by	William Ramsay

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About the noble gas group

Full outer electron shells make these gases almost inert: they barely react, glow in discharge lamps and are used to create unreactive atmospheres.

Data: Periodic-Table-JSON (CC BY-SA 3.0) · stored statically on our server. https://en.wikipedia.org/wiki/Xenon

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