Symbol
Mg
Atomic Number
12
Atomic Mass
24.305
Protons
12
Neutrons
12
Electrons
12
Type
Alkaline Earth Metal
Isotopes
Magnesium-24, Magnesium-25, Magnesium-26
Discovery Year
1755
Discovered By
Joseph Black
Group
2
Period
3
Boiling Point
1994°F
Melting Point
1202°F
Electron Configuration
[Ne] 3s²
Density (g/cm³)
1.738
Crystal Structure
Hexagonal
Magnetism
Diamagnetic
Abundance in Earth's Crust
2.33%
Phase at Room Temperature
Solid