Fluorine |
| Symbol | F |
|---|---|
| Latin name | Fluorum |
| Atomic number | 9 |
| Period | 2 |
| Element category | Halogens |
| Relative atomic mass | 18.9984032 |
| Group | VII.A |
| Electronegativity | 4.0 |
| Oxidation numbers | -1 |
| Electron configuration | 1s2 2s2 2p5 |
| Density [g/cm3] | 0.001696 |
| State | Gas |
| Melting point [°C] | -219.62 |
| Boiling point [°C] | -188.14 |
| Critical point [°C] | -129.02 |
| Critical pressure [MPa] | 5.172 |
| Atomic radius [pm] | 42 |
| Covalent radius [pm] | 71 |
| Thermal conductivity [W m-1K-1] | 0.0279 |
| Heat capacity [J K-1g-1] | 0.824 |
| Discovery | 1886 |
| 1.st ionization energy [eV] | 17.4228 |
| 2.nd ionization energy [eV] | 34.97 |
| 3.rd ionization energy [eV] | 62.707 |
| Stable isotopes | 1 |
| Unstable isotopes | 5 |