was discovered by the British Humphry Davy in 1808
The chemical symbol for Magnesium is Mg and its atomic number is 12.
We find it listed in the periodic table of elements in group 2 and 3 and period block s.
Magnesium belongs to the family or series of chemical alkaline earth metals, This element is stable.
Magnesium came from Magnesia a name for a greek region.
Atomic number (Z) 12
Group, block group 2 (alkaline earth metals), s-block
Period: period 3
Element category: alkaline earth metal
Standard atomic weight (Ar) 24.305 (24.304–24.307)
Electron configuration: [Ne] 3s2
per shell: 2, 8, 2
Physical properties
Phase: solid
Melting point: 923 K (650 °C, 1202 °F)
Boiling point: 1363 K (1091 °C, 1994 °F)
Density near r.t.: 1.738 g/cm3
when liquid, at m.p. 1.584 g/cm3
Heat of fusion: 8.48 kJ/mol
Heat of vaporization: 128 kJ/mol
Molar heat capacity: 24.869 J/(mol•K)
Atomic properties
Oxidation states: +2, +1
Electronegativity: Pauling scale: 1.31
Ionization energies 1st: 737.7 kJ/mol
2nd: 1450.7 kJ/mol
3rd: 7732.7 kJ/mol
Atomic radius empirical: 160 pm
Covalent radius: 141±7 pm
Van der Waals radius: 173 pm
Crystal structure: hexagonal close-packed
Speed of sound thin rod: 4940 m/s (at r.t.) (annealed)
Thermal expansion 24.8 µm/(m•K) (at 25 °C)
Thermal conductivity: 156 W/(m•K)
Electrical resistivity: 43.9 nΩ•m (at 20 °C)