The most electronegative element known: fluorine takes electrons from almost anything, including glass and water.
- Atomic number
- 9
- Atomic mass
- 18.998 u
- Phase
- Gas
- Electron configuration
- [He] 2s² 2p⁵
- Melting point
- 53.48 K · -219.7 °C
- Boiling point
- 85.03 K · -188.1 °C
- Density
- 0.002 g/cm³
- Electronegativity
- 3.98
- Period / Group
- 2 / 17
- Discovery year
- 1886