12 Mg
Alkaline earth metal
Magnesium
Burns with bright white flame.
Properties of Magnesium
- Atomic number (Z)
- 12
- Symbol
- Mg
- Atomic mass
- 24.305 g/mol
- Category
- Alkaline earth metal
- Group
- 2
- Period
- 3
- Electron configuration
- [Ne] 3s²
- Electronegativity (Pauling)
- 1.31
- Atomic radius
- 145 pm
- First ionization energy
- 738 kJ/mol
- Melting point
- 923 K (649.9 °C)
- Boiling point
- 1363 K (1089.8 °C)
- Density
- 1.738 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1755