NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Copper (Cu)

Atomic Number = 29

Atomic Weight = 63.546

Reference E95

Isotope   Mass       Abundance Spin Mag Moment
63Cu 62.939598 69.17% 3/2 +2.2233 65Cu 64.927793 30.83% 3/2 +2.3817
Cu I  Ground State 1s22s22p63s23p63d104s  2S1/2
      Ionization energy  62317.44 cm-1 (7.72638 eV)   Ref. SM90
Cu II Ground State 1s22s22p63s23p63d10  1S0
      Ionization energy  163669.2 cm-1 (20.2924 eV)   Ref. SM90