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 |