NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Fluorine (F)

Atomic Number = 9

Atomic Weight = 18.9984032

Reference E95

Isotope   Mass        Abundance Spin Mag Moment
19F 18.9984032 100% 1/2 +2.6887
F I  Ground State 1s22s22p5  23/2
     Ionization energy  140524.5 cm-1 (17.4228 eV)   Ref. L49
F II Ground State 1s22s22p4  3P2
     Ionization energy  282058.6 cm-1 (34.9708 eV)   Ref. P69