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
Frequently asked questions
What is Magnesium?
Magnesium (Mg) is an alkaline earth metal, element number 12 on the periodic table. Burns with bright white flame.
What is the atomic number and atomic mass of Magnesium?
Magnesium has atomic number 12 and an atomic mass of about 24.305 g/mol.
What is the electron configuration of Magnesium?
The electron configuration of Magnesium is [Ne] 3s².
Where is Magnesium on the periodic table?
Magnesium sits in group 2, period 3, and is classified as a alkaline earth metal.