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Atomic Number	9

Atomic Symbol	F

Atomic Weight	18.9984032 amu

Group	Halogen, 17

Form	Gas

Density @ STP	1.667 g/L

Melting Point	-219.66 °C (-363.39 °F, 53.49 °K)

Boiling Point	-188.12 °C (-306.62 °F, 85.03 °K)

Heat of Fusion	0.51 kJ/mol

Heat of Vaporization	6.62 kJ/mol

First Ionization Potential	17.42282 eV

Electronegativity (on Pauling scale	3.98

Specific Heat Capacity	0.824 J/g K

Ground State Electron Configuration	2p⁵

Oxidation State(s)	-1

Stable Isotopes and Natural Abundance on Earth	¹⁹F, 100%

Selected Radioisotopes	¹⁸F

Atomic Radius	42 pm

Crystal Structure	Monoclinic

Discovered by	Moisson, 1886