NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Chlorine (Cl)

Atomic Number = 17

Atomic Weight = 35.4527

Reference E95

  Isotope   Mass   Abundance   Spin   Mag Moment 

Cl I  Ground State 1s22s22p63s23p5 23/2
       Ionization energy  104591.0 cm-1 (12.96763 eV)   Ref. RK69

Cl II Ground State 1s22s22p63s23p4 3P2
       Ionization energy  192070 cm-1 (23.8136 eV)   Ref. RK74