| Element | Magnesium | Symbol | Mg |
| Atomic Number | 12 | Molar Mass | 24.31 gmol-1 |
| Electron Configuration | [Ne]3s2 | Normal State | solid metal |
| Density @STP | 1.74 g cm-3 | Melting Point | 650oC |
| Boiling Point | 1090oC | Stable Isotopes | 24Mg, 25Mg, 26Mg |
| Atomic Radius | 160 pm | Ionic Radius | 72 (2+) pm |
| Electronegativity (Pauling) | 1.31 | Ionization Energy (1st) | 738 kJ mol-1 |
| Ionization Energy (2nd) | 1451 kJ mol-1 | Ionization Energy (3rd) | 7733 kJ mol-1 |
| Molar Heat Capacity | 24.9 J K-1mol-1 | Standard Molar Entropy | 32.7 J K-1mol-1 |
| Enthalpy of Fusion | 9.04 kJ mol-1 | Enthalpy of Vapourization | 128.7 kJ mol-1 |