Magnesium |
Symbol | Mg |
---|---|
Latin name | Magnesium |
Atomic number | 12 |
Period | 3 |
Element category | Alkaline earth 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 |