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NIST Atomic Spectra Database
Ionization Energies Data

Ta (all spectra)
73 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)
 

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At. num | El. Name | Isoel. Seq. | Ground Shells (a) | Ground Level    |        Ionization Energy (eV)        |   Uncertainty (eV)   | References
--------|----------|-------------|-------------------|-----------------|--------------------------------------|----------------------|-----------
     73 | Tantalum | Ta          | [Xe].4f14.5d3.6s2 | 4F<3/2>         |              7.549571                |           0.000025   |    L13153
     73 | Tantalum | Hf          | [Xe].4f14.5d3.6s  | 5F<1>           |            [16.2]                    |           0.5        |    L16139
     73 | Tantalum | Lu          | [Xe].4f14.5d3     | 4F<3/2>         |            (23.1)                    |           1.6        |  L8672c99
     73 | Tantalum | Yb          | [Xe].4f14.5d2     | 3F<2>           |            (35.0)                    |           1.7        |  L8672c99
     73 | Tantalum | Tm          | [Xe].4f14.5d      | 2D<3/2>         |            [48.272]                  |           0.025      |     L3654
     73 | Tantalum | Er          | [Xe].4f14         | 1S0             |            [94.01]                   |           0.05       |     L3654
     73 | Tantalum | Ho          | [Xe].4f13         | 2F*<7/2>        |           (119)                      |           6          |      L582
     73 | Tantalum | Dy          | [Cd].4f13.5p5     |                 |           (139)                      |           7          |      L582
     73 | Tantalum | Tb          | [Cd].4f13.5p4     | *               |           (159)                      |           8          |      L582
     73 | Tantalum | Gd          | [Cd].4f13.5p3     |                 |           (180)                      |           9          |      L582
     73 | Tantalum | Eu          | [Cd].4f13.5p2     | 4F*<7/2>        |           (213)                      |          11          |      L582
     73 | Tantalum | Sm          | [Cd].4f13.5p      |                 |           (235)                      |          12          |      L582
     73 | Tantalum | Pm          | [Cd].4f13         | 2F*<7/2>        |           (262)                      |          14          |      L582
     73 | Tantalum | Nd          | [Cd].4f12         | 3H<6>           |           (304)                      |          15          |      L582
     73 | Tantalum | Pr          | [Cd].4f11         | 4I*<15/2>       |           (338)                      |          17          |      L582
     73 | Tantalum | Ce          | [Kr].4d10.4f11.5s | 5I*<8>          |           (363)                      |          19          |      L582
     73 | Tantalum | La          | [Kr].4d10.4f11    | *               |           (396)                      |          20          |      L582
     73 | Tantalum | Ba          | [Kr].4d10.4f10    |                 |           (439)                      |          22          |      L582
     73 | Tantalum | Cs          | [Kr].4d10.4f9     | 6H*<15/2>       |           (482)                      |          24          |      L582
     73 | Tantalum | Xe          | [Kr].4d10.4f8     | 7F<6>           |           (530)                      |          30          |      L582
     73 | Tantalum | I           | [Kr].4d10.4f7     | 8S*<7/2>        |           (570)                      |          30          |      L582
     73 | Tantalum | Te          | [Kr].4d10.4f6     | 7F0             |           (610)                      |          30          |      L582
     73 | Tantalum | Sb          | [Kr].4d10.4f5     | 6H*<5/2>        |           (660)                      |          30          |      L582
     73 | Tantalum | Sn          | [Kr].4d10.4f4     | 5I<4>           |           (700)                      |          30          |      L582
     73 | Tantalum | In          | [Kr].4d10.4f3     | 4I*<9/2>        |           (750)                      |          40          |      L582
     73 | Tantalum | Cd          | [Kr].4d10.4f2     | 3H<4>           |           (790)                      |          40          |      L582
     73 | Tantalum | Ag          | [Kr].4d10.4f      | 2F*<5/2>        |           (832)                      |          10          |   L582c99
     73 | Tantalum | Pd          | [Kr].4d10         | 1S0             |          (1064)                      |           4          |  L8672c99
     73 | Tantalum | Rh          | [Kr].4d9          | 2D<5/2>         |          (1110)                      |           4          |  L8672c99
     73 | Tantalum | Ru          | [Kr].4d8          | 3F<4>           |          (1160)                      |           4          |  L8672c99
     73 | Tantalum | Tc          | [Kr].4d7          | 4F<9/2>         |          (1211)                      |           4          |  L8672c99
     73 | Tantalum | Mo          | [Kr].4d6          | 5D<4>           |          (1262)                      |           4          |  L8672c99
     73 | Tantalum | Nb          | [Kr].4d5          | 6S<5/2>         |          (1313)                      |           4          |  L8672c99
     73 | Tantalum | Zr          | [Kr].4d4          | 5D0             |          (1382)                      |           5          |  L8672c99
     73 | Tantalum | Y           | [Kr].4d3          | 4F<3/2>         |          (1434)                      |           5          |  L8672c99
     73 | Tantalum | Sr          | [Kr].4d2          | 3F<2>           |          (1490)                      |           5          |  L8672c99
     73 | Tantalum | Rb          | [Kr].4d           | 2D<3/2>         |          (1542)                      |           5          |  L8672c99
     73 | Tantalum | Kr          | [Ar].3d10.4s2.4p6 | 1S0             |          (1748)                      |           4          |  L8672c99
     73 | Tantalum | Br          | [Ar].3d10.4s2.4p5 | 2P*<3/2>        |          (1799)                      |           4          |  L8672c99
     73 | Tantalum | Se          | [Ar].3d10.4s2.4p4 | 3P<2>           |          (1857)                      |           4          |  L8672c99
     73 | Tantalum | As          | [Ar].3d10.4s2.4p3 | 4S*<3/2>        |          (1910)                      |           4          |  L8672c99
     73 | Tantalum | Ge          | [Ar].3d10.4s2.4p2 | 3P0             |          (2053)                      |           4          |  L8672c99
     73 | Tantalum | Ga          | [Ar].3d10.4s2.4p  | 2P*<1/2>        |          (2113)                      |           4          |  L8672c99
     73 | Tantalum | Zn          | [Ar].3d10.4s2     | 1S0             |          (2254)                      |           4          |  L8672c99
     73 | Tantalum | Cu          | [Ar].3d10.4s      | 2S<1/2>         |          [2314.7]                    |           1.9        |     L5473
     73 | Tantalum | Ni          | [Ar].3d10         | 1S0             |           3898.7                     |           2.5        |    L10191
     73 | Tantalum | Co          | [Ar].3d9          | 2D<5/2>         |          (4014)                      |           4          |  L8672c99
     73 | Tantalum | Fe          | [Ar].3d8          | 3F<4>           |          (4143)                      |           4          |  L8672c99
     73 | Tantalum | Mn          | [Ar].3d7          | 4F<9/2>         |          (4278)                      |           4          |  L8672c99
     73 | Tantalum | Cr          | [Ar].3d6          | <4>             |          (4410)                      |           4          |  L8672c99
     73 | Tantalum | V           | [Ar].3d5          | <5/2>           |          (4537)                      |           4          |  L8672c99
     73 | Tantalum | Ti          | [Ar].3d4          | 5D0             |          (4745)                      |           4          |  L8672c99
     73 | Tantalum | Sc          | [Ar].3d3          | 4F<3/2>         |          (4877)                      |           4          |  L8672c99
     73 | Tantalum | Ca          | [Ar].3d2          | 3F<2>           |          (5024)                      |           5          |  L8672c99
     73 | Tantalum | K           | [Ar].3d           | 2D<3/2>         |          (5159)                      |           5          |  L8672c99
     73 | Tantalum | Ar          | [Ne].3s2.3p6      | 1S0             |          (5537)                      |           5          |  L8672c99
     73 | Tantalum | Cl          | [Ne].3s2.3p5      | 2P*<3/2>        |          (5655)                      |           5          |  L8672c99
     73 | Tantalum | S           | [Ne].3s2.3p4      | 3P<2>           |          (5785)                      |           6          |  L8672c99
     73 | Tantalum | P           | [Ne].3s2.3p3      | 2P*<3/2>        |          (5907)                      |           6          |  L8672c99
     73 | Tantalum | Si          | [Ne].3s2.3p2      | 3P0             |          (6364)                      |           7          |  L8672c99
     73 | Tantalum | Al          | [Ne].3s2.3p       | 2P*<1/2>        |          (6502)                      |          10          |  L8672c99
     73 | Tantalum | Mg          | [Ne].3s2          | 1S0             |          (6769)                      |          12          |  L8672c99
     73 | Tantalum | Na          | [Ne].3s           | 2S<1/2>         |          (6900)                      |          15          |  L8672c99
     73 | Tantalum | Ne          | 1s2.2s2.2p6       | 1S0             |         (15137)                      |          19          |  L8672c99
     73 | Tantalum | F           | 1s2.2s2.2p5       | 2P*<3/2>        |         (15461)                      |          24          |  L8672c99
     73 | Tantalum | O           | 1s2.2s2.2p4       | 3P<2>           |         (15820)                      |          30          |  L8672c99
     73 | Tantalum | N           | 1s2.2s2.2p3       | (0,3/2)*<3/2>   |         (16150)                      |          40          |  L8672c99
     73 | Tantalum | C           | 1s2.2s2.2p2       | 3P0             |         (17840)                      |          40          |  L8672c99
     73 | Tantalum | B           | 1s2.2s2.2p        | 2P*<1/2>        |         (18250)                      |          50          |  L8672c99
     73 | Tantalum | Be          | 1s2.2s2           | 1S0             |         (18760)                      |          50          |  L8672c99
     73 | Tantalum | Li          | 1s2.2s            | 2S<1/2>         |         (19088.51)                   |           0.19       | L16264c99
     73 | Tantalum | He          | 1s2               | 1S0             |         (76852.00)                   |           0.17       |    L21139
     73 | Tantalum | H           | 1s                | 2S<1/2>         |         (78394.63)                   |           0.12       |    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

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