Essential Facts
| Atomic number | 55 |
| Name | Caesium / Cesium |
| Symbol | Cs |
| Atomic mass | 132.905 |
| Classification | Alkali metal |
| State at 20°C | Solid |
| Melting point | 28.44°C |
| Boiling point | 671°C |
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Caesium (Cs)Essential Facts
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