| Magnesium ✕ | |
|---|---|
| Symbol | Mg |
| Atomic number | 12 |
| Chemical property | Alkaline earth metal |
| Origin o the name | Magnesia, a district of Eastern Thessaly in Greece |
| Group | 2 |
| Period | 3 |
| Atomic weight (u) | 24.305 |
| Atomic weight uncertainty (u) | 0 |
| Density (g/cm³) | 1.738 |
| Melting point (K) | 923 |
| Boiling point (K) | 1363 |
| Heat capacity (J/(g·K)) | 1.023 |
| Electro-negativity | 1.31 |
| Abundance in earth's crust (mg/kg) | 23300 |