### Atomic Data for Antimony (Sb)

### Atomic Number = 51

### Atomic Weight = 121.75

### Reference = E95

    Isotope    Mass        Abundance Spin Mag Moment

    121Sb      120.903821  57.3%     5/2  +3.3592
    123Sb      122.904216  42.7%     7/2  +2.5466

    Sb I  Ground State 1s22s22p63s23p63d104s24p64d105s25p3  4S°3/2
          Ionization energy  69431.34 cm-1 (8.60839 eV)   Ref. BW86

    Sb II Ground State 1s22s22p63s23p63d104s24p64d105s25p2  3P0
          Ionization energy  134100 cm-1 (16.63 eV)   Ref. C66b