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/5 |
|---|
|
| Barium |
| Symbol: Ba, phase: solid, silvery gray pale yellow tint |
| Properties | |
|---|---|
| Atomic number | 56 |
| Atomic weight | 137.327 |
| Melting point (K) | 1000 |
| Boiling point (K) | 2118 |
| Speed of sound (m/s) | 1620 |
| Discovery | 1772 (C. W Scheele) |