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

35Cl      34.968852  75.77%    3/2  +0.82187
37Cl      36.965903  24.23%    3/2  +0.68412

 
Cl I  Ground State 1s22s22p63s23p5  2P°3/2
      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