NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Magnesium (Mg)

Atomic Number = 12

Atomic Weight = 24.3050

Reference E95


Isotope   Mass       Abundance Spin Mag Moment

24Mg      23.985042  78.99%    0    
25Mg      24.985837  10.00%    5/2  -0.85545
26Mg      25.982593  11.01%    0    

 
Mg I  Ground State 1s22s22p63s2  1S0
      Ionization energy  61671.05 cm-1 (7.646235 eV)   Ref. KM91a
 
Mg II Ground State 1s22s22p63s  2S1/2
      Ionization energy  121267.64 cm-1 (15.03527 eV)   Ref. KM91a