NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Bromine (Br)

Atomic Number = 35

Atomic Weight = 79.904

Reference E95

Isotope   Mass       Abundance Spin Mag Moment
79Br 78.918336 50.69% 3/2 +2.1064 81Br 80.916289 49.31% 3/2 +2.2706
Br I  Ground State 1s22s22p63s23p63d104s24p5  23/2
      Ionization energy  95284.8 cm-1 (11.8138 eV)   Ref. T63
Br II Ground State 1s22s22p63s23p63d104s24p4  3P2
      Ionization energy  174140 cm-1 (21.591 eV)   Ref. M98