### Atomic Data for Arsenic (As)

### Atomic Number = 33

### Atomic Weight = 74.9216

### Reference = E95

    Isotope   Mass       Abundance Spin Mag Moment

    75As      74.921594  100%      3/2  +1.43947

    As I  Ground State 1s22s22p63s23p63d104s24p3  4S°3/2
          Ionization energy  78950 cm-1 (9.7886 eV)   Ref. BJ71

    As II Ground State 1s22s22p63s23p63d104s24p2  3P0
          Ionization energy  149932 cm-1 (18.5892 eV)   Ref. LA71