Thorium is a chemical element from the periodic table. It is a silvery-white metal that is fairly abundant in the Earth's crust. Thorium is used in nuclear power plants as a fuel and in some ceramics as a coloring agent. Thorium also has applications in the production of high-strength alloys and in the production of aerospace and automotive parts.
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| Atomic number | 90 |
| Group | IVB |
| Period | 7 |
| Mass | 232.03806 |
| Latin name | Thorium |
| Electron configuration | [Rn]6d2 7s2 |
| Oxidation state | 0, 1, 2, 3, 4 |