Comparison of Bromine and Xenon

Attribute	Xenon ×	Bromine ×
Atomic mass (u)	131.29	79.9
Standard state	Gas	Liquid
Oxidation states	0	-1 +1 +5
Electron configuration	[Kr]5s²4d¹⁰5p⁶	[Ar]4s²3d¹⁰4p⁵
Atomic radius (van der waals) (pm)	216	183
Electronegativity (pauling scale)	2.6	2.96
Electron affinity (eV)	-	3.365
Ionization energy (eV)	12.13	11.814
Boiling point (K)	165.03	331.95
Melting point (K)	161.36	265.95
^1↑Density (g/cm³)	0.005887	3.11
Atomic number	54	35
Group name	Noble gas	Halogen
Symbol	Xe	Br
Discovered (year)	1898	1826