NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Scandium (Sc)

Atomic Number = 21

Atomic Weight = 44.955910

Reference E95

Isotope   Mass       Abundance Spin Mag Moment
45Sc 44.955910 100% 7/2 +4.756
Sc I  Ground State 1s22s22p63s23p63d4s2  2D3/2
      Ionization energy  52922.0 cm-1 (6.56149 eV)   Ref. SC85
Sc II Ground State 1s22s22p63s23p63d4s  3D1
      Ionization energy  103237.1 cm-1 (12.79977 eV)   Ref. SC85