Comparison of Magnesium and Radium

Attribute	Radium ×	Magnesium ×
Standard state	Solid	Solid
Electron configuration	[Rn]7s²	[Ne]3s²
Atomic mass (u)	226.02541	24.305
Electronegativity (pauling scale)	0.9	1.31
Oxidation states	+2	+2
Ionization energy (eV)	5.279	7.646
Atomic radius (van der waals) (pm)	283	173
Boiling point (K)	1413	1363
Melting point (K)	973	923
Density (g/cm³)	5	1.74
Atomic number	88	12
Group name	Alkaline earth metal	Alkaline earth metal
Discovered (year)	1898	1808
Symbol	Ra	Mg