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