Comparison of Magnesium and Strontium

Attribute	Strontium ×	Magnesium ×
Standard state	Solid	Solid
Electron configuration	[Kr]5s²	[Ne]3s²
Atomic mass (u)	87.62	24.305
Electronegativity (pauling scale)	0.95	1.31
Oxidation states	+2	+2
Ionization energy (eV)	5.695	7.646
Atomic radius (van der waals) (pm)	249	173
Boiling point (K)	1655	1363
Melting point (K)	1050	923
Density (g/cm³)	2.64	1.74
Atomic number	38	12
Group name	Alkaline earth metal	Alkaline earth metal
Discovered (year)	1790	1808
Symbol	Sr	Mg