12Mg
Magnesium
Alkaline Earth MetalMagnesium (Mg) is element 12, an alkaline earth metal, in period 3 and group 2 of the periodic table. Its standard atomic weight is 24.305, it melts at 650 °C and boils at 1091 °C. Discovered by Joseph Black, 1755.
Atomic Number12
SymbolMg
NameMagnesium
Atomic Weight24.305 u
CategoryAlkaline Earth Metal
Period3
Group2
Melting Point650 °C
Boiling Point1091 °C
Density1.738 g/cm³
Electron Config[Ne] 3s2
Discovered ByJoseph Black, 1755