Comparison of Chlorine and Xenon

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