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NIST Atomic Spectra Database
Ionization Energies Data

Bk I
1 Data Row Found
Z = 97, Bk isoelectronic sequence 
Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2023). NIST Atomic Spectra Database (ver. 5.11), [Online]. Available: https://physics.nist.gov/asd [2024, April 20]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F
BibTex Citation (new window)
 

 At. Num.   Sp.  Name.   Ion  Charge   El.  name   Isoel.  Seq.   Ground  Shells a   Ground  Level   Ionized  Level   Ionization  Energy 
 (eV) 		 Uncertainty
 (eV) 		  References 
97  Bk I  0  Berkelium  Bk  [Rn]5f97s2   6H°15/2  5f97s 7H°8    6.19785                 0.00025   L15992 
Notes:
a Designations used in the ground shell lists:
[Rn] = 1s22s22p63s23p63d104s24p64d105s25p64f145d106s26p6

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