NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Sodium (Na)

Atomic Number = 11

Atomic Weight = 22.989768

Reference E95

  Isotope   Mass   Abundance   Spin   Mag Moment 

Na I  Ground State 1s22s22p63s 2S1/2
       Ionization energy  41449.451 cm-1 (5.139076 eV)   Ref. BBLB98

Na II Ground State 1s22s22p6 1S0
       Ionization energy  381390.2 cm-1 (47.2864 eV)   Ref. MZ81