Potassium is an alkali metal from the periodic table. It is a soft, silvery-white metal that is found in many common foods. Potassium is an essential element for life and is used in many industrial processes, including the production of potassium hydroxide, potassium nitrate and potassium chloride.
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| Atomic number | 19 |
| Group | IA |
| Period | 4 |
| Mass | 39.0983 |
| Latin name | Kalium |
| Electron configuration | [Ar]4s |
| Oxidation state | -1, 0, 1 |