Details : Item 215
| 1 | 2 | 3 | 4 | 5 | 6 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Alkali metals |  |  |  |  |  |  | |||||
| Alkaline earth metal |  |  |  |  |  |  | |||||
| Transition metals I |  |  |  |  |  |  | |||||
| Transition metals II |  |  |  |  |  |  | |||||
| Transition metals III |  |  |  |  |  |  | |||||
| Transition metals IV |  |  |  |  |  |  | |||||
| Post-transition metal |  |  |  |  | | | |||||
| Metalloid | | | | | | | |||||
| Diatomic non-metal | | | | | | | |||||
| Noble gas | | | | | | | |||||
| Other | | | | | | | |||||
 | |||||||||||
| Famille : Alkaline earth metal/1 |
|---|
|
| Beryllium |
| Symbol: Be, phase: solid, white-gray metallic |
| Properties | |
|---|---|
| Atomic number | 4 |
| Atomic weight | 9.012 |
| Melting point (K) | 1560 |
| Boiling point (K) | 2742 |
| Speed of sound (m/s) | 12,890 |
| Discovery | 1797 (L.N. Vauquelin) |