12
Mg
magnesium
24.305

General properties

Group
group 2 (alkaline metals)
Period
period 3
Category
alkaline earth metals
Standard atomic weight
24.305
[24.304, 24.307]
Melting point
923 K (650 °C)
Boiling point
1363 K (1090 °C)
Phase at STP
solid

Additional properties

Block
s-block
Electron configuration
[Ne] 3s²
Electrons per shell
2, 8, 2
Electronegativity
1.31
Density
1.738 g/cm³
Oxidation states
+1, +2 (a strongly basic oxide)
CAS Number
7439-95-4