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NIST Atomic Spectra Database Ionization Energies Data
Pa (all spectra) |
Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2024). NIST Atomic Spectra Database (ver. 5.12), [Online]. Available: https://physics.nist.gov/asd [2025, April 27]. 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 |
---|---|---|---|---|---|---|---|
91 | Protactinium | Pa | [Rn]5f26d7s2 | 4K11/2 | [5.89] | 0.12 | L16359 |
91 | Protactinium | Th | [Rn]5f27s2 | 3H4 | [11.9] | 0.4 | L13741c99 |
91 | Protactinium | Ac | [Rn]5f26d | 4I11/2 | [18.6] | 0.4 | L13741c99 |
91 | Protactinium | Ra | [Rn]5f2 | 3H4 | [30.9] | 0.4 | L13741c99 |
91 | Protactinium | Fr | [Rn]5f | 2F°5/2 | (44.3) | 0.4 | L12354c99 |
91 | Protactinium | Rn | [Hg]6p6 | 1S0 | (72.0) | 2.0 | L8672c99 |
91 | Protactinium | At | [Hg]6p5 | 2P°3/2 | (85.1) | 2.0 | L8672c99 |
91 | Protactinium | Po | [Hg]6p4 | 3P2 | (98.9) | 2.1 | L8672c99 |
91 | Protactinium | Bi | [Hg]6p3 | 4S°3/2 | (111.0) | 2.2 | L8672c99 |
91 | Protactinium | Pb | [Hg]6p2 | 3P0 | (137.0) | 2.2 | L8672c99 |
91 | Protactinium | Tl | [Hg]6p | 2P°1/2 | (153.0) | 2.4 | L8672c99 |
91 | Protactinium | Hg | [Xe]4f145d106s2 | 1S0 | (187.0) | 2.5 | L8672c99 |
91 | Protactinium | Au | [Xe]4f145d106s | 2S1/2 | (203) | 3 | L8672c99 |
91 | Protactinium | Pt | [Xe]4f145d10 | 1S0 | (292) | 3 | L8672c99 |
91 | Protactinium | Ir | [Xe]4f145d9 | 2D5/2 | (316) | 3 | L8672c99 |
91 | Protactinium | Os | [Xe]4f145d8 | 3F4 | (342) | 3 | L8672c99 |
91 | Protactinium | Re | [Xe]4f145d7 | 4F9/2 | (369) | 3 | L8672c99 |
91 | Protactinium | W | [Xe]4f145d6 | 5D4 | (395) | 3 | L8672c99 |
91 | Protactinium | Ta | [Xe]4f145d5 | 6S5/2 | (423) | 3 | L8672c99 |
91 | Protactinium | Hf | [Xe]4f145d4 | 5D0 | (460) | 4 | L8672c99 |
91 | Protactinium | Lu | [Xe]4f145d3 | 4F3/2 | (488) | 4 | L8672c99 |
91 | Protactinium | Yb | [Xe]4f145d2 | 3F2 | (518) | 4 | L8672c99 |
91 | Protactinium | Tm | [Xe]4f145d | 2D3/2 | (546) | 4 | L8672c99 |
91 | Protactinium | Er | [Xe]4f14 | 1S0 | (690) | 40 | L582 |
91 | Protactinium | Ho | [Cd]4f145p5 | 2P°3/2 | (720) | 40 | L582 |
91 | Protactinium | Dy | [Cd]4f145p4 | 3P2 | (760) | 40 | L582 |
91 | Protactinium | Tb | [Cd]4f145p3 | 2P°3/2 | (790) | 40 | L582 |
91 | Protactinium | Gd | [Cd]4f145p2 | 3P0 | (880) | 40 | L582 |
91 | Protactinium | Eu | [Cd]4f145p | 2P°1/2 | (920) | 50 | L582 |
91 | Protactinium | Sm | [Cd]4f14 | 1S0 | (1 020) | 50 | L582 |
91 | Protactinium | Pm | [Kr]4d104f145s | 2S1/2 | (1 060) | 50 | L582 |
91 | Protactinium | Nd | [Kr]4d104f14 | 1S0 | (1 150) | 60 | L582 |
91 | Protactinium | Pr | [Kr]4d104f13 | 2F°7/2 | (1 220) | 60 | L582 |
91 | Protactinium | Ce | [Kr]4d104f12 | (1 300) | 60 | L582 | |
91 | Protactinium | La | [Kr]4d104f11 | 4I°15/2 | (1 370) | 70 | L582 |
91 | Protactinium | Ba | [Kr]4d104f10 | 5I8 | (1 450) | 70 | L582 |
91 | Protactinium | Cs | [Kr]4d104f9 | 6H°15/2 | (1 520) | 80 | L582 |
91 | Protactinium | Xe | [Kr]4d104f8 | 7F6 | (1 600) | 80 | L582 |
91 | Protactinium | I | [Kr]4d104f7 | 8S°7/2 | (1 670) | 80 | L582 |
91 | Protactinium | Te | [Kr]4d104f6 | 7F0 | (1 760) | 90 | L582 |
91 | Protactinium | Sb | [Kr]4d104f5 | 6H°5/2 | (1 830) | 90 | L582 |
91 | Protactinium | Sn | [Kr]4d104f4 | 5I4 | (1 910) | 100 | L582 |
91 | Protactinium | In | [Kr]4d104f3 | 4I°9/2 | (1 980) | 100 | L582 |
91 | Protactinium | Cd | [Kr]4d104f2 | 3H4 | (2 060) | 100 | L582 |
91 | Protactinium | Ag | [Kr]4d104f | 2F°5/2 | (2 130) | 110 | L582 |
91 | Protactinium | Pd | [Kr]4d10 | 1S0 | (2 483) | 4 | L8672c99 |
91 | Protactinium | Rh | [Kr]4d9 | 2D5/2 | (2 550) | 4 | L8672c99 |
91 | Protactinium | Ru | [Kr]4d8 | 3F4 | (2 620) | 4 | L8672c99 |
91 | Protactinium | Tc | [Kr]4d7 | 4F9/2 | (2 696) | 4 | L8672c99 |
91 | Protactinium | Mo | [Kr]4d6 | 5D4 | (2 766) | 4 | L8672c99 |
91 | Protactinium | Nb | [Kr]4d5 | (0,5/2)5/2 | (2 837) | 4 | L8672c99 |
91 | Protactinium | Zr | [Kr]4d4 | 5D0 | (2 968) | 4 | L8672c99 |
91 | Protactinium | Y | [Kr]4d3 | 4F3/2 | (3 040) | 4 | L8672c99 |
91 | Protactinium | Sr | [Kr]4d2 | 3F2 | (3 119) | 5 | L8672c99 |
91 | Protactinium | Rb | [Kr]4d | 2D3/2 | (3 193) | 5 | L8672c99 |
91 | Protactinium | Kr | [Ar]3d104s24p6 | 1S0 | (3 488) | 5 | L8672c99 |
91 | Protactinium | Br | [Ar]3d104s24p5 | 2P°3/2 | (3 558) | 5 | L8672c99 |
91 | Protactinium | Se | [Ar]3d104s24p4 | 3P2 | (3 637) | 6 | L8672c99 |
91 | Protactinium | As | [Ar]3d104s24p3 | (0,3/2)°3/2 | (3 709) | 6 | L8672c99 |
91 | Protactinium | Ge | [Ar]3d104s24p2 | 3P0 | (4 077) | 7 | L8672c99 |
91 | Protactinium | Ga | [Ar]3d104s24p | 2P°1/2 | (4 161) | 10 | L8672c99 |
91 | Protactinium | Zn | [Ar]3d104s2 | 1S0 | (4 370) | 12 | L8672c99 |
91 | Protactinium | Cu | [Ar]3d104s | 2S1/2 | [4 454] | 5 | L10278 |
91 | Protactinium | Ni | [Ar]3d10 | 1S0 | (7 181) | 19 | L8672c99 |
91 | Protactinium | Co | [Ar]3d9 | 2D5/2 | (7 341) | 24 | L8672c99 |
91 | Protactinium | Fe | [Ar]3d8 | 3F4 | (7 510) | 30 | L8672c99 |
91 | Protactinium | Mn | [Ar]3d7 | 4F9/2 | (7 690) | 40 | L8672c99 |
91 | Protactinium | Cr | [Ar]3d6 | (0,4)4 | (7 870) | 40 | L8672c99 |
91 | Protactinium | V | [Ar]3d5 | (0,5/2)5/2 | (8 040) | 50 | L8672c99 |
91 | Protactinium | Ti | [Ar]3d4 | 5D0 | (8 410) | 50 | L8672c99 |
91 | Protactinium | Sc | [Ar]3d3 | 4F3/2 | (8 590) | 60 | L8672c99 |
91 | Protactinium | Ca | [Ar]3d2 | 3F2 | (8 780) | 60 | L8672c99 |
91 | Protactinium | K | [Ar]3d | 2D3/2 | (8 960) | 70 | L8672c99 |
91 | Protactinium | Ar | [Ne]3s23p6 | 1S0 | (9 460) | 90 | L8672c99 |
91 | Protactinium | Cl | [Ne]3s23p5 | 2P°3/2 | (9 620) | 90 | L8672c99 |
91 | Protactinium | S | [Ne]3s23p4 | 3P2 | (9 790) | 100 | L8672c99 |
91 | Protactinium | P | [Ne]3s23p3 | 2P°3/2 | (9 950) | 110 | L8672c99 |
91 | Protactinium | Si | [Ne]3s23p2 | 3P0 | (11 100) | 120 | L8672c99 |
91 | Protactinium | Al | [Ne]3s23p | 2P°1/2 | (11 290) | 120 | L8672c99 |
91 | Protactinium | Mg | [Ne]3s2 | 1S0 | (11 660) | 140 | L8672c99 |
91 | Protactinium | Na | [Ne]3s | 2S1/2 | (11 840) | 150 | L8672c99 |
91 | Protactinium | Ne | 1s22s22p6 | 1S0 | (24 660) | 160 | L8672c99 |
91 | Protactinium | F | 1s22s22p5 | 2P°3/2 | (25 080) | 170 | L8672c99 |
91 | Protactinium | O | 1s22s22p4 | 3P2 | (25 540) | 190 | L8672c99 |
91 | Protactinium | N | 1s22s22p3 | (0,3/2)°3/2 | (25 970) | 200 | L8672c99 |
91 | Protactinium | C | 1s22s22p2 | 3P0 | (30 230) | 220 | L8672c99 |
91 | Protactinium | B | 1s22s22p | 2P°1/2 | (30 800) | 240 | L8672c99 |
91 | Protactinium | Be | 1s22s2 | 1S0 | (31 520) | 250 | L8672c99 |
91 | Protactinium | Li | 1s22s | 2S1/2 | (31 971.6) | 0.6 | L16264c99 |
91 | Protactinium | He | 1s2 | 1S0 | (126 304.8) | 0.7 | L21139 |
91 | Protactinium | H | 1s | 2S1/2 | (128 507) | 3 | L19200 |
If you did not find the data you need, please inform the ASD Team.
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