NIST Atomic Ionization Energies Output

NIST Atomic Spectra Database Ionization Energies Data Mg (all spectra) 12 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 2]. 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
--------|-----------|-------------|-------------------|--------------|--------------------------------------|----------------------|--------------
     12 | Magnesium | Mg          | [Ne].3s2          | 1S0          |              7.646236                |           0.000004   | L10635,L6969
     12 | Magnesium | Na          | [Ne].3s           | 2S<1/2>      |             15.035271                |           0.000006   |       L10635
     12 | Magnesium | Ne          | 1s2.2s2.2p6       | 1S0          |             80.1436                  |           0.0006     |  L4995,L1434
     12 | Magnesium | F           | 1s2.2s2.2p5       | 2P*<3/2>     |           [109.2654]                 |           0.0012     |  L4995,L2720
     12 | Magnesium | O           | 1s2.2s2.2p4       | 3P<2>        |           [141.33]                   |           0.03       |       L11770
     12 | Magnesium | N           | 1s2.2s2.2p3       | 4S*<3/2>     |           [186.76]                   |           0.06       |       L10635
     12 | Magnesium | C           | 1s2.2s2.2p2       | 3P0          |           [225.02]                   |           0.06       |       L11770
     12 | Magnesium | B           | 1s2.2s2.2p        | 2P*<1/2>     |           [265.924]                  |           0.019      |       L11770
     12 | Magnesium | Be          | 1s2.2s2           | 1S0          |           [327.99]                   |           0.04       |       L11770
     12 | Magnesium | Li          | 1s2.2s            | 2S<1/2>      |           (367.489)                  |           0.007      |    L16264c99
     12 | Magnesium | He          | 1s2               | 1S0          |          (1761.8049)                 |           0.0010     |       L21139
     12 | Magnesium | H           | 1s                | 2S<1/2>      |          (1962.663889)               |           0.000007   |       L19200
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Notes:
(a) Designations used in the ground shell lists:
     [Ne] = 1s2.2s2.2p6

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