Comparison of Chlorine and Xenon

Attribute	Xenon ×	Chlorine ×
Atomic mass (u)	131.29	35.45
Standard state	Gas	Gas
Oxidation states	0	-1 +1 +5 +7
Electron configuration	[Kr]5s²4d¹⁰5p⁶	[Ne]3s²3p⁵
Atomic radius (van der waals) (pm)	216	175
Electronegativity (pauling scale)	2.6	3.16
Electron affinity (eV)	-	3.617
Ionization energy (eV)	12.13	12.968
Boiling point (K)	165.03	239.11
^1↑Melting point (K)	161.36	171.65
Density (g/cm³)	0.005887	0.003214
Atomic number	54	17
Group name	Noble gas	Halogen
Symbol	Xe	Cl
Discovered (year)	1898	1774