NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

[skip navigation] National Institute of Standards and Technology NIST Physical Measurement Laboratory Selenium (Se) 

Homepage - IntroductionFinding listSelect element by name.Select element by atomic number.Select element from periodic tableSelenium Atomic DataSelenium Strong LinesSelenium Neutral Atom Persistent Lines Selenium Neutral Atom Energy LevelsSelenium Singly Ionized Persistent LinesSelenium Singly Ionized Energy LevelsSelenium References
Switch to Formatted Version

Atomic Data for Selenium (Se)

Atomic Number = 34

Atomic Weight = 78.96

Reference E95


Isotope   Mass       Abundance Spin Mag Moment

74Se      73.922475  0.9%      0    
76Se      75.919212  9.2%      0    
77Se      76.919212  7.6%      1/2  +0.535506
78Se      77.9173    23.7%     0    
80Se      79.916520  49.8%     0    
82Se      81.916698  8.8%      0    

 
Se I  Ground State 1s22s22p63s23p63d104s24p4  3P2
      Ionization energy  78658.35 cm-1 (9.75239 eV)   Ref. MV74,LP77
 
Se II Ground State 1s22s22p63s23p63d104s24p3  4S°3/2
      Ionization energy  170900 cm-1 (21.19 eV)   Ref. CR58