Comparison of Zinc and Cadmium

Attribute	Cadmium ×	Zinc ×
Standard state	Solid	Solid
Electron configuration	[Kr]5s²4d¹⁰	[Ar]4s²3d¹⁰
Atomic mass (u)	112.41	65.4
Electronegativity (pauling scale)	1.69	1.65
Oxidation states	+2	+2
Ionization energy (eV)	8.994	9.394
Atomic radius (van der waals) (pm)	158	139
Boiling point (K)	1040	1180
Melting point (K)	594.22	692.68
Density (g/cm³)	8.69	7.134
Atomic number	48	30
Group name	Transition metal	Transition metal
Discovered (year)	1817	1746
Symbol	Cd	Zn