| Thorium [Th] (CAS-ID: 7440-29-1) | |
| An: 90 N: 142 Am: 232.0381 | |
| Group Name: Actinoid | |
| Block: f-block Period: 7 (actinoid) | |
| State: solid at 298 K | |
| Colour: silvery white Classification: Metallic | |
| Boiling Point: 5061K (4788'C) | |
| Melting Point: 2115K (1842'C) | |
| Density: 11.7g/cm3 | |
 Discovery Information |
| Who: Juns Berzelius |
| When: 1828 |
| Where: Sweden |
| Name Origin |
| From the Scandinavian god Thor. |
| Sources |
| Found in various minerals like monazite and thorite. Thorium is found in small amounts in most rocks and soils, where it is three times more abundant than uranium and about as common as lead. |
| Uses |
| Used in making strong alloys, ultraviolet photoelectric cells, mantles in portable gas lights, coating tungsten wire in electronic equipment, . Bombarded with neutrons make uranium-233, a nuclear fuel. |
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