Stable isotope Magnesium (Ma)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Enrichment Level Chemical Form
Mg-24 12 12 23.9850419 78.99% 99.75% Oxide
Mg-25 12 13 24.9858370 10.00% ≥98.30% Oxide
Mg-26 12 14 25.9825930 11.01% 99.60% Oxide

Properties of Magnesium

Name Magnesium
Symbol Mg
Atomic number 12
Atomic weight 24.305
Standard state Solid at 298 °K
CAS Registry ID 7439-95-4
Group in periodic table 2
Group name Alkaline earth metal
Period in periodic table 3
Block in periodic table s-block
Color Silvery white
Classification Metallic
Melting point 650 °C
Boiling point 1090 °C
Vaporization point 1090 ºC
Thermal conductivity 1.56 W/(m·K) at 298.2 °K
Electrical resistivity 4.46 µΩ·cm at 20 °C
Electronegativity 1.20
Specific heat 1.05 kJ/kg K
Heat of vaporization 128 kJ·mol-1 at 1090 °C
Heat of fusion 8.7 kJ·mol-1
Density of liquid 1.57 g/cm3 at 650 ºC
Density of solid 1.74 g/cm3 at 20 °C
Atomic radius 1.60 Å
Ionic radius Mg2+: 0.72 Å
Oxidation state +2
Electron configuration [Ne]3s2