Magnesium was discovered by Joseph Black, in England, in 1755. The element was isolated by A. A. B. Bussy and Sir Humphrey Davy in 1808.
Name: Magnesium
Symbol: Mg
Atomic number: 12
Atomic weight: 24.305
State: solid
Group, period, block: 2, 3, s
Color: shiny grey solid
Classification: alkaline earth metal
Electron configuration: 3s2
2,8,2
Physical properties
Density: 1.738 g.m-3
Melting point: 923 K, 650 °C, 1202 °F
Boiling point: 1363 K, 1091 °C, 1994 °F
Atomic properties
Oxidation states: 2, 1[1]
Electronegativity: 1.31 (Pauling scale)
Ionization energies: 1st: 737.7 kJ·mol-1
Covalent radius: 141±7 pm
Van der Waals radius: 173 pm
- Mg
Electron Configuration
Isotopes
There are three naturally occurring isotopes of magnesium exist, 24Mg, 25Mg, and 26Mg.