Fluorine (F)
Fluorum
Fluorine (F) is a halogen in period 2, group 17. Its relative atomic mass is 18.998 and the molar mass of the atom is 18.998 g/mol; the molar mass of F₂ is 37.996 g/mol.
Atomic number 9
Atomic mass 18.998
Molar mass 18.998 g/mol F₂: 37.996 g/mol
Category Halogen Gas
Properties of fluorine
| Atomic number | 9 |
|---|---|
| Symbol | F |
| Latin name | Fluorum |
| Relative atomic mass | 18.998 |
| Molar mass | 18.998 g/mol · F₂: 37.996 g/mol |
| Group, period, block | 17, 2, p |
| Category | Halogen |
| State at 20 °C | Gas |
| Electron configuration | [He] 2s² 2p⁵ |
| Electronegativity (Pauling) | 3.98 |
| Atomic radius | 50 pm |
Electron configuration of fluorine
Electrons per shell
K2L7
Full notation
1s² 2s² 2p⁵
Noble-gas notation
9 protons · 9 electrons[He] 2s² 2p⁵
Formula and compounds of fluorine
Simple substanceF₂fluorineMolar mass of F₂: 37.996 g/mol
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Frequently asked questions
The relative atomic mass of fluorine is 18.998, so the molar mass of the atom is 18.998 g/mol; the molar mass of F₂ is 37.996 g/mol.
Full: 1s² 2s² 2p⁵. Noble-gas notation: [He] 2s² 2p⁵.