Key information
Atomic number: 
54
Atomic weight: 
131.3
Density: 
3060 kg/m³
Boiling point: 
165.16° K
Melting point: 
161.26° K
Heat vapour: 
12.65 kJ/mol
Heat fusion: 
2.3 kJ/mol
Group: 
Noble Gases

Xenon is a trace element in the atmosphere of the earth. It was discovered in 1898, by the Scottish chemist William Ramsay and English chemist Morris W. Travers. Ramsay chilled a sample of the atmosphere until it became a liquid, then warmed the liquid and captured the gases as they boiled off.

Electron Shell: