Fluorine is an element from the periodic table and is a pale yellow, highly reactive gas. Fluorine is used in many industrial applications, such as water purification, toothpaste production, and as a component of refrigerants.
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| Atomic number | 9 |
| Group | VIIA |
| Period | 2 |
| Mass | 18.998404 |
| Latin name | Fluorum |
| Electron configuration | 1s2 2s2 2p5 |
| Oxidation state | -1, 0 |