Magnesium

Symbol | Mg
Latin name | Magnesium
Atomic number | 12
Period | 3
Element category | Metals
Relative atomic mass | 24.3050
Group | II.A
Electronegativity | 1.2
Oxidation numbers | 2
Electron configuration | 1s2 2s2 2p6 3s2
Density [g/cm3] | 1.735
State | Solid
Melting point [°C] | 648.8
Boiling point [°C] | 1090
Atomic radius [pm] | 145
Covalent radius [pm] | 130
Thermal conductivity [W m-1K-1] | 156
Heat capacity [J K-1g-1] | 1.02
Discovery | 1808
Hardness [Mohs scale] | 2.25
Brinell hardness [MPa] | 260
Young's modulus [GPa] | 45
Electrical conductivity [S m-1] | 2.24 · 107
Shear modulus [GPa] | 17
1.st ionization energy [eV] | 7.6462
2.nd ionization energy [eV] | 15.035
3.rd ionization energy [eV] | 80.143
Stable isotopes | 3
Unstable isotopes | 5