Comparison of Cadmium and Polonium

Attribute	Polonium ×	Cadmium ×
Standard state	Solid	Solid
Electron affinity (eV)	1.9	-
Electron configuration	[Xe]6s²4f¹⁴5d¹⁰6p⁴	[Kr]5s²4d¹⁰
Atomic mass (u)	208.98243	112.41
Electronegativity (pauling scale)	2	1.69
Oxidation states	+2 +4	+2
Ionization energy (eV)	8.417	8.994
Atomic radius (van der waals) (pm)	197	158
Boiling point (K)	1235	1040
Melting point (K)	527	594.22
Density (g/cm³)	9.32	8.69
Atomic number	84	48
Group name	Metalloid	Transition metal
Discovered (year)	1898	1817
Symbol	Po	Cd