NIST Atomic Ionization Energies Output

NIST Atomic Spectra Database Ionization Energies Data Se (all spectra) 34 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, May 8]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F BibTex Citation (new window)
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At. num | El. Name | Isoel. Seq. | Ground Shells (a) | Ground Level |        Ionization Energy (eV)        |   Uncertainty (eV)   | References
--------|----------|-------------|-------------------|--------------|--------------------------------------|----------------------|------------
     34 | Selenium | Se          | [Ar].3d10.4s2.4p4 | 3P<2>        |              9.752368                |           0.000006   |     L21645
     34 | Selenium | As          | [Ar].3d10.4s2.4p3 | 4S*<3/2>     |             21.196                   |           0.010      | L17234c100
     34 | Selenium | Ge          | [Ar].3d10.4s2.4p2 | 3P0          |             31.697                   |           0.019      |     L17867
     34 | Selenium | Ga          | [Ar].3d10.4s2.4p  | 2P*<1/2>     |             42.947                   |           0.003      |       L925
     34 | Selenium | Zn          | [Ar].3d10.4s2     | 1S0          |            [68.30]                   |           0.10       |     L16139
     34 | Selenium | Cu          | [Ar].3d10.4s      | 2S<1/2>      |             81.83                    |           0.03       |      L4300
     34 | Selenium | Ni          | [Ar].3d10         | 1S0          |            155.327                   |           0.012      |      L6168
     34 | Selenium | Co          | [Ar].3d9          | 2D<5/2>      |           (184.0)                    |           2.1        |   L8672c99
     34 | Selenium | Fe          | [Ar].3d8          | 3F<4>        |           (219.0)                    |           2.2        |   L8672c99
     34 | Selenium | Mn          | [Ar].3d7          | 4F<9/2>      |           (255.0)                    |           2.2        |   L8672c99
     34 | Selenium | Cr          | [Ar].3d6          | 5D<4>        |           (291.0)                    |           2.4        |   L8672c99
     34 | Selenium | V           | [Ar].3d5          | 6S<5/2>      |           (342.9)                    |           2.5        |   L8672c99
     34 | Selenium | Ti          | [Ar].3d4          | 5D0          |           (383)                      |           3          |   L8672c99
     34 | Selenium | Sc          | [Ar].3d3          | 4F<3/2>      |           (426)                      |           3          |   L8672c99
     34 | Selenium | Ca          | [Ar].3d2          | 3F<2>        |           (473)                      |           3          |   L8672c99
     34 | Selenium | K           | [Ar].3d           | 2D<3/2>      |           (517)                      |           3          |   L8672c99
     34 | Selenium | Ar          | [Ne].3s2.3p6      | 1S0          |           [650.5]                    |           2.1        |     L11770
     34 | Selenium | Cl          | [Ne].3s2.3p5      | 2P*<3/2>     |           [693.4]                    |           0.7        |     L11770
     34 | Selenium | S           | [Ne].3s2.3p4      | 3P<2>        |           [739.8]                    |           1.1        |     L11770
     34 | Selenium | P           | [Ne].3s2.3p3      | 4S*<3/2>     |           [798]                      |           3          |     L11770
     34 | Selenium | Si          | [Ne].3s2.3p2      | 3P0          |           [845.8]                    |           2.0        |     L11770
     34 | Selenium | Al          | [Ne].3s2.3p       | 2P*<1/2>     |           [887]                      |           4          |     L11770
     34 | Selenium | Mg          | [Ne].3s2          | 1S0          |           [989.6]                    |           1.3        |     L11770
     34 | Selenium | Na          | [Ne].3s           | 2S<1/2>      |          [1036.36]                   |           0.03       |     L11770
     34 | Selenium | Ne          | 1s2.2s2.2p6       | 1S0          |          [2540.7]                    |           1.4        |     L11770
     34 | Selenium | F           | 1s2.2s2.2p5       | 2P*<3/2>     |          [2674]                      |           5          |     L11770
     34 | Selenium | O           | 1s2.2s2.2p4       | 3P<2>        |          [2820]                      |           6          |     L11770
     34 | Selenium | N           | 1s2.2s2.2p3       | 4S*<3/2>     |          [2964]                      |          22          |     L11770
     34 | Selenium | C           | 1s2.2s2.2p2       | 3P0          |          [3146]                      |           3          |     L11770
     34 | Selenium | B           | 1s2.2s2.2p        | 2P*<1/2>     |          [3301.8]                    |           2.1        |     L11770
     34 | Selenium | Be          | 1s2.2s2           | 1S0          |          [3507]                      |           3          |     L11770
     34 | Selenium | Li          | 1s2.2s            | 2S<1/2>      |          (3636.526)                  |           0.007      |  L16264c99
     34 | Selenium | He          | 1s2               | 1S0          |         (15367.493)                  |           0.003      |     L21139
     34 | Selenium | H           | 1s                | 2S<1/2>      |         (15968.1075)                 |           0.0012     |     L19200
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Notes:
(a) Designations used in the ground shell lists:
     [Ne] = 1s2.2s2.2p6
     [Ar] = 1s2.2s2.2p6.3s2.3p6
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