Lanthanum is a rare earth metal from the periodic table. It is a soft, ductile metal with a silvery-white color. Lanthanum is used in a wide range of industrial applications, including the production of catalysts for the oil and gas industry and in the manufacture of optical lenses. It is also used in the production of batteries, fuel cells and superconductors.
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| Atomic number | 57 |
| Group | IIIB |
| Period | 6 |
| Mass | 138.90547 |
| Latin name | Lanthanum |
| Electron configuration | [Xe]5d6s2 |
| Oxidation state | 0, 1, 2, 3 |