Fluorine

Atomic number9
Atomic weight18.9984032
Discovery (year)1886
Atomic radius (A)0.71
Melting point (oC)-219.62
Boiling point (oC)-188.14
Density (g/cm3)1.71
Specific heat (cal/g oC)0.18
Ionization potential (eV)17.422
Electron Affinity (eV)3.399