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NIST Atomic Spectra Database
Ionization Energies Data

Ru (all spectra)
44 Data Rows Found 
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 27]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F
BibTex Citation (new window)
 

 At. Num.   El.  name   Isoel.  Seq.   Ground  Shells a   Ground  Level   Ionization  Energy 
 (eV) 		 Uncertaintyb 
 (eV) 		  References 
44  Ruthenium  Ru  [Kr]4d75s   5F5    7.36050                 0.00005   L10032 
44  Ruthenium  Tc  [Kr]4d7   4F9/2    [16.76]                   0.06      L17219 
44  Ruthenium  Mo  [Kr]4d6   5D4    [28.47]                     L3466,L17276 
44  Ruthenium  Nb  [Kr]4d5   6S5/2    (45.0)                    1.7       L8672c99 
44  Ruthenium  Zr  [Kr]4d4   5D0    (59.0)                    1.9       L8672c99 
44  Ruthenium  Y  [Kr]4d3   4F3/2    (76.0)                    2.0       L8672c99 
44  Ruthenium  Sr  [Kr]4d2   3F2    (93.0)                    2.0       L8672c99 
44  Ruthenium  Rb  [Kr]4d   2D3/2    (110.0)                    2.1       L8672c99 
44  Ruthenium  Kr  [Ar]3d104s24p6   1S0    [178.41]                   0.05      L1798 
44  Ruthenium  Br  [Ar]3d104s24p5   2P°3/2    (198.0)                    2.2       L8672c99 
44  Ruthenium  Se  [Ar]3d104s24p4   3P2    (219.9)                    2.4       L8672c99 
44  Ruthenium  As  [Ar]3d104s24p3   4S°3/2    (245.0)                    2.5       L8672c99 
44  Ruthenium  Ge  [Ar]3d104s24p2   3P0    (271)                      3         L8672c99 
44  Ruthenium  Ga  [Ar]3d104s24p   2P°1/2    [295.90]                   0.09      L6833 
44  Ruthenium  Zn  [Ar]3d104s2   1S0    (348)                      3         L8672c99 
44  Ruthenium  Cu  [Ar]3d104s   2S1/2    376.25                    0.10      L5953 
44  Ruthenium  Ni  [Ar]3d10   1S0    (670)                      3         L8672c99 
44  Ruthenium  Co  [Ar]3d9   2D5/2    (723)                      3         L8672c99 
44  Ruthenium  Fe  [Ar]3d8   3F4    (784)                      3         L8672c99 
44  Ruthenium  Mn  [Ar]3d7   4F9/2    (845)                      4         L8672c99 
44  Ruthenium  Cr  [Ar]3d6   5D4    (905)                      4         L8672c99 
44  Ruthenium  V  [Ar]3d5   6S5/2    (981)                      4         L8672c99 
44  Ruthenium  Ti  [Ar]3d4   5D0    (1 048)                      4         L8672c99 
44  Ruthenium  Sc  [Ar]3d3   4F3/2    (1 115)                      4         L8672c99 
44  Ruthenium  Ca  [Ar]3d2   3F2    (1 187)                      4         L8672c99 
44  Ruthenium  K  [Ar]3d   2D3/2    (1 253)                      4         L8672c99 
44  Ruthenium  Ar  [Ne]3s23p6   1S0    [1 447]                      4         L11770 
44  Ruthenium  Cl  [Ne]3s23p5   2P°3/2    [1 506.7]                    1.6       L11770 
44  Ruthenium  S  [Ne]3s23p4   3P2    [1 577.0]                    2.1       L11770 
44  Ruthenium  P  [Ne]3s23p3   4S°3/2    [1 659]                      6         L11770 
44  Ruthenium  Si  [Ne]3s23p2   3P0    [1 743]                      4         L11770 
44  Ruthenium  Al  [Ne]3s23p   2P°1/2    [1 794]                      8         L11770 
44  Ruthenium  Mg  [Ne]3s2   1S0    [1 949]                      3         L11770 
44  Ruthenium  Na  [Ne]3s   2S1/2    [2 013.04]                   0.06      L11770 
44  Ruthenium  Ne  1s22s22p6   1S0    [4 758]                      3         L11770 
44  Ruthenium  F  1s22s22p5   2P°3/2    [4 939]                      8         L11770 
44  Ruthenium  O  1s22s22p4   3P2    [5 136]                      11         L11770 
44  Ruthenium  N  1s22s22p3   (0,3/2)°3/2    [5 330]                      40         L11770 
44  Ruthenium  C  1s22s22p2   3P0    [5 647]                      6         L11770 
44  Ruthenium  B  1s22s22p   2P°1/2    [5 861]                      4         L11770 
44  Ruthenium  Be  1s22s2   1S0    [6 137]                      6         L11770 
44  Ruthenium  Li  1s22s   2S1/2    (6 311.721)                  0.019     L16264c99 
44  Ruthenium  He  1s2   1S0    (26 229.888)                  0.011     L21139 
44  Ruthenium  H  1s   2S1/2    (27 033.564)                  0.005     L19200 
Notes:
a Designations used in the ground shell lists:
[Ne] = 1s22s22p6
[Ar] = 1s22s22p63s23p6
[Kr] = 1s22s22p63s23p63d104s24p6
b Uncertainties of some of the listed values are unknown.

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