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NIST Atomic Spectra Database
Ionization Energies Data

Ra (all spectra)
88 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 28]. 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)        |   Uncertainty (eV)   | References
--------|----------|-------------|--------------------|-----------------|--------------------------------------|----------------------|-----------
     88 | Radium   | Ra          | [Rn].7s2           | 1S0             |             5.2784239                |          0.0000025   |     L4979
     88 | Radium   | Fr          | [Rn].7s            | 2S<1/2>         |            10.14718                  |          0.00006     |    L19486
     88 | Radium   | Rn          | [Hg].6p6           | 1S0             |           (31.0)                     |          1.6         |  L8672c99
     88 | Radium   | At          | [Hg].6p5           | 2P*<3/2>        |           (41.0)                     |          1.7         |  L8672c99
     88 | Radium   | Po          | [Hg].6p4           | 3P<2>           |           (52.9)                     |          1.9         |  L8672c99
     88 | Radium   | Bi          | [Hg].6p3           | 4S*<3/2>        |           (64.0)                     |          2.0         |  L8672c99
     88 | Radium   | Pb          | [Hg].6p2           | 3P0             |           (82.0)                     |          2.0         |  L8672c99
     88 | Radium   | Tl          | [Hg].6p            | 2P*<1/2>        |           (97.0)                     |          2.1         |  L8672c99
     88 | Radium   | Hg          | [Xe].4f14.5d10.6s2 | 1S0             |          (124.0)                     |          2.2         |  L8672c99
     88 | Radium   | Au          | [Xe].4f14.5d10.6s  | 2S<1/2>         |          (140.0)                     |          2.2         |  L8672c99
     88 | Radium   | Pt          | [Xe].4f14.5d10     | 1S0             |          (204.9)                     |          2.4         |  L8672c99
     88 | Radium   | Ir          | [Xe].4f14.5d9      | 2D<5/2>         |          (227.0)                     |          2.5         |  L8672c99
     88 | Radium   | Os          | [Xe].4f14.5d8      | 3F<4>           |          (250)                       |          3           |  L8672c99
     88 | Radium   | Re          | [Xe].4f14.5d7      | 4F<9/2>         |          (274)                       |          3           |  L8672c99
     88 | Radium   | W           | [Xe].4f14.5d6      | 5D<4>           |          (299)                       |          3           |  L8672c99
     88 | Radium   | Ta          | [Xe].4f14.5d5      | 6S<5/2>         |          (324)                       |          3           |  L8672c99
     88 | Radium   | Hf          | [Xe].4f14.5d4      | 5D0             |          (356)                       |          3           |  L8672c99
     88 | Radium   | Lu          | [Xe].4f14.5d3      | 4F<3/2>         |          (382)                       |          3           |  L8672c99
     88 | Radium   | Yb          | [Xe].4f14.5d2      | 3F<2>           |          (409)                       |          3           |  L8672c99
     88 | Radium   | Tm          | [Xe].4f14.5d       | 2D<3/2>         |          (435)                       |          4           |  L8672c99
     88 | Radium   | Er          | [Xe].4f14          | 1S0             |          (570)                       |         30           |      L582
     88 | Radium   | Ho          | [Cd].4f14.5p5      | 2P*<3/2>        |          (600)                       |         30           |      L582
     88 | Radium   | Dy          | [Cd].4f14.5p4      | 3P<2>           |          (630)                       |         30           |      L582
     88 | Radium   | Tb          | [Cd].4f14.5p3      | 2P*<3/2>        |          (660)                       |         30           |      L582
     88 | Radium   | Gd          | [Cd].4f14.5p2      | 3P0             |          (740)                       |         40           |      L582
     88 | Radium   | Eu          | [Cd].4f14.5p       | 2P*<1/2>        |          (770)                       |         40           |      L582
     88 | Radium   | Sm          | [Cd].4f14          | 1S0             |          (860)                       |         40           |      L582
     88 | Radium   | Pm          | [Kr].4d10.4f14.5s  | 2S<1/2>         |          (900)                       |         40           |      L582
     88 | Radium   | Nd          | [Kr].4d10.4f14     | 1S0             |          (970)                       |         50           |      L582
     88 | Radium   | Pr          | [Kr].4d10.4f13     | 2F*<7/2>        |         (1040)                       |         50           |      L582
     88 | Radium   | Ce          | [Kr].4d10.4f12     |                 |         (1110)                       |         60           |      L582
     88 | Radium   | La          | [Kr].4d10.4f11     | 4I*<15/2>       |         (1180)                       |         60           |      L582
     88 | Radium   | Ba          | [Kr].4d10.4f10     | 5I<8>           |         (1250)                       |         60           |      L582
     88 | Radium   | Cs          | [Kr].4d10.4f9      | 6H*<15/2>       |         (1320)                       |         70           |      L582
     88 | Radium   | Xe          | [Kr].4d10.4f8      | 7F<6>           |         (1390)                       |         70           |      L582
     88 | Radium   | I           | [Kr].4d10.4f7      | 8S*<7/2>        |         (1460)                       |         70           |      L582
     88 | Radium   | Te          | [Kr].4d10.4f6      | 7F0             |         (1530)                       |         80           |      L582
     88 | Radium   | Sb          | [Kr].4d10.4f5      | 6H*<5/2>        |         (1610)                       |         80           |      L582
     88 | Radium   | Sn          | [Kr].4d10.4f4      | 5I<4>           |         (1680)                       |         80           |      L582
     88 | Radium   | In          | [Kr].4d10.4f3      | 4I*<9/2>        |         (1750)                       |         90           |      L582
     88 | Radium   | Cd          | [Kr].4d10.4f2      | 3H<4>           |         (1820)                       |         90           |      L582
     88 | Radium   | Ag          | [Kr].4d10.4f       | 2F*<5/2>        |         (1880)                       |        100           |      L582
     88 | Radium   | Pd          | [Kr].4d10          | 1S0             |         (2208)                       |          4           |  L8672c99
     88 | Radium   | Rh          | [Kr].4d9           | 2D<5/2>         |         (2271)                       |          4           |  L8672c99
     88 | Radium   | Ru          | [Kr].4d8           | 3F<4>           |         (2338)                       |          4           |  L8672c99
     88 | Radium   | Tc          | [Kr].4d7           | 4F<9/2>         |         (2409)                       |          4           |  L8672c99
     88 | Radium   | Mo          | [Kr].4d6           | 5D<4>           |         (2477)                       |          4           |  L8672c99
     88 | Radium   | Nb          | [Kr].4d5           | <5/2>           |         (2544)                       |          4           |  L8672c99
     88 | Radium   | Zr          | [Kr].4d4           | 5D0             |         (2662)                       |          4           |  L8672c99
     88 | Radium   | Y           | [Kr].4d3           | 4F<3/2>         |         (2731)                       |          4           |  L8672c99
     88 | Radium   | Sr          | [Kr].4d2           | 3F<2>           |         (2806)                       |          4           |  L8672c99
     88 | Radium   | Rb          | [Kr].4d            | 2D<3/2>         |         (2876)                       |          4           |  L8672c99
     88 | Radium   | Kr          | [Ar].3d10.4s2.4p6  | 1S0             |         (3155)                       |          4           |  L8672c99
     88 | Radium   | Br          | [Ar].3d10.4s2.4p5  | 2P*<3/2>        |         (3224)                       |          5           |  L8672c99
     88 | Radium   | Se          | [Ar].3d10.4s2.4p4  | 3P<2>           |         (3298)                       |          5           |  L8672c99
     88 | Radium   | As          | [Ar].3d10.4s2.4p3  | *<3/2>          |         (3368)                       |          5           |  L8672c99
     88 | Radium   | Ge          | [Ar].3d10.4s2.4p2  | 3P0             |         (3682)                       |          5           |  L8672c99
     88 | Radium   | Ga          | [Ar].3d10.4s2.4p   | 2P*<1/2>        |         (3762)                       |          6           |  L8672c99
     88 | Radium   | Zn          | [Ar].3d10.4s2      | 1S0             |         (3959)                       |          6           |  L8672c99
     88 | Radium   | Cu          | [Ar].3d10.4s       | 2S<1/2>         |         [4040]                       |          4           |    L10278
     88 | Radium   | Ni          | [Ar].3d10          | 1S0             |         (6565)                       |         10           |  L8672c99
     88 | Radium   | Co          | [Ar].3d9           | 2D<5/2>         |         (6718)                       |         12           |  L8672c99
     88 | Radium   | Fe          | [Ar].3d8           | 3F<4>           |         (6881)                       |         15           |  L8672c99
     88 | Radium   | Mn          | [Ar].3d7           | 4F<9/2>         |         (7056)                       |         19           |  L8672c99
     88 | Radium   | Cr          | [Ar].3d6           | <4>             |         (7222)                       |         24           |  L8672c99
     88 | Radium   | V           | [Ar].3d5           | <5/2>           |         (7380)                       |         30           |  L8672c99
     88 | Radium   | Ti          | [Ar].3d4           | 5D0             |         (7720)                       |         40           |  L8672c99
     88 | Radium   | Sc          | [Ar].3d3           | 4F<3/2>         |         (7890)                       |         40           |  L8672c99
     88 | Radium   | Ca          | [Ar].3d2           | 3F<2>           |         (8080)                       |         50           |  L8672c99
     88 | Radium   | K           | [Ar].3d            | 2D<3/2>         |         (8250)                       |         50           |  L8672c99
     88 | Radium   | Ar          | [Ne].3s2.3p6       | 1S0             |         (8730)                       |         60           |  L8672c99
     88 | Radium   | Cl          | [Ne].3s2.3p5       | 2P*<3/2>        |         (8880)                       |         60           |  L8672c99
     88 | Radium   | S           | [Ne].3s2.3p4       | 3P<2>           |         (9040)                       |         70           |  L8672c99
     88 | Radium   | P           | [Ne].3s2.3p3       | 2P*<3/2>        |         (9200)                       |         90           |  L8672c99
     88 | Radium   | Si          | [Ne].3s2.3p2       | 3P0             |        (10190)                       |         90           |  L8672c99
     88 | Radium   | Al          | [Ne].3s2.3p        | 2P*<1/2>        |        (10360)                       |        100           |  L8672c99
     88 | Radium   | Mg          | [Ne].3s2           | 1S0             |        (10720)                       |        110           |  L8672c99
     88 | Radium   | Na          | [Ne].3s            | 2S<1/2>         |        (10890)                       |        120           |  L8672c99
     88 | Radium   | Ne          | 1s2.2s2.2p6        | 1S0             |        (22900)                       |        120           |  L8672c99
     88 | Radium   | F           | 1s2.2s2.2p5        | 2P*<3/2>        |        (23300)                       |        140           |  L8672c99
     88 | Radium   | O           | 1s2.2s2.2p4        | 3P<2>           |        (23750)                       |        150           |  L8672c99
     88 | Radium   | N           | 1s2.2s2.2p3        | (0,3/2)*<3/2>   |        (24160)                       |        160           |  L8672c99
     88 | Radium   | C           | 1s2.2s2.2p2        | 3P0             |        (27830)                       |        170           |  L8672c99
     88 | Radium   | B           | 1s2.2s2.2p         | 2P*<1/2>        |        (28370)                       |        190           |  L8672c99
     88 | Radium   | Be          | 1s2.2s2            | 1S0             |        (29050)                       |        200           |  L8672c99
     88 | Radium   | Li          | 1s2.2s             | 2S<1/2>         |        (29479.8)                     |          0.5         | L16264c99
     88 | Radium   | He          | 1s2                | 1S0             |       (116853.5)                     |          0.5         |    L21139
     88 | Radium   | H           | 1s                 | 2S<1/2>         |       (118929.5)                     |          1.1         |    L19200
--------------------------------------------------------------------------------------------------------------------------------------------------
Notes:
(a) Designations used in the ground shell lists:
     [Ne] = 1s2.2s2.2p6
     [Ar] = 1s2.2s2.2p6.3s2.3p6
     [Kr] = 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6
     [Cd] = 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2
     [Xe] = 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6
     [Hg] = 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2
     [Rn] = 1s2.2s2.2p6.3s2.3p6.3d10.4s2.4p6.4d10.5s2.5p6.4f14.5d10.6s2.6p6

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