Comparison of Bromine and Xenon

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