Cesium
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| Cesium | |
|---|---|
| Properties | |
| Atomic symbol | Cs |
| Atomic number | 55 |
| Classification | Standard metal |
| Atomic mass | 132.9 amu |
| Other Information | |
| Date of discovery | 1860 |
| Name of discoverer | Fustov Kirchoff |
| Name origin | From the Latin caesius. |
| Uses | Cesium removes air traces in vacuum tubes. |
| Obtained from | pollucite or lepidolite. |