### Atomic Data for Tantalum (Ta)

### Atomic Number = 73

### Atomic Weight = 180.9479

### Reference = E95

    Isotope    Mass        Abundance Spin Mag Moment

    180Ta      179.947462  0.012%    9
    181Ta      220.011368  99.998%   7/2  +2.370

    Ta I  Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d36s2  4F3/2
          Ionization energy  60891.4 cm-1 (7.54957 eV)   Ref. SKJ94

    Ta II Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d36s  5F1