NIST Atomic Spectra Database Ionization Energies Data
Np (all spectra) |
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 3]. 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 --------|-----------|-------------|--------------------|-----------------|--------------------------------------|----------------------|----------- 93 | Neptunium | Np | [Rn].5f4.6d.7s2 | 6L<11/2> | 6.26554 | 0.00025 | L15992 93 | Neptunium | U | [Rn].5f4.6d.7s | 7L<5> | [11.5] | 0.4 | L13741c99 93 | Neptunium | Pa | [Rn].5f5 | 6H*<5/2> | [19.7] | 0.4 | L13741c99 93 | Neptunium | Th | [Rn].5f4 | 5I<4> | [33.8] | 0.4 | L13741c99 93 | Neptunium | Ac | [Rn].5f3 | 4I*<9/2> | (48.0) | 1.9 | L8672c99 93 | Neptunium | Ra | [Rn].5f2 | 3H<4> | (65.0) | 2.0 | L8672c99 93 | Neptunium | Fr | [Rn].5f | 2F*<5/2> | (92) | 5 | L582 93 | Neptunium | Rn | [Hg].5f.6p5 | | (107) | 5 | L582 93 | Neptunium | At | [Hg].5f.6p4 | * | (121) | 6 | L582 93 | Neptunium | Po | [Hg].5f.6p3 | | (136) | 7 | L582 93 | Neptunium | Bi | [Hg].5f.6p2 | * | (151) | 8 | L582 93 | Neptunium | Pb | [Hg].6p2 | 3P0 | (179.0) | 2.5 | L8672c99 93 | Neptunium | Tl | [Hg].6p | 2P*<1/2> | (196) | 3 | L8672c99 93 | Neptunium | Hg | [Xe].4f14.5d10.6s2 | 1S0 | (233) | 3 | L8672c99 93 | Neptunium | Au | [Xe].4f14.5d10.6s | 2S<1/2> | (252) | 3 | L8672c99 93 | Neptunium | Pt | [Xe].4f14.5d10 | 1S0 | (355) | 3 | L8672c99 93 | Neptunium | Ir | [Xe].4f14.5d9 | 2D<5/2> | (382) | 3 | L8672c99 93 | Neptunium | Os | [Xe].4f14.5d8 | 3F<4> | (408) | 3 | L8672c99 93 | Neptunium | Re | [Xe].4f14.5d7 | 4F<9/2> | (438) | 3 | L8672c99 93 | Neptunium | W | [Xe].4f14.5d6 | 5D<4> | (466) | 4 | L8672c99 93 | Neptunium | Ta | [Xe].4f14.5d5 | 6S<5/2> | (495) | 4 | L8672c99 93 | Neptunium | Hf | [Xe].4f14.5d4 | 5D0 | (535) | 4 | L8672c99 93 | Neptunium | Lu | [Xe].4f14.5d3 | 4F<3/2> | (565) | 4 | L8672c99 93 | Neptunium | Yb | [Xe].4f14.5d2 | 3F<2> | (596) | 4 | L8672c99 93 | Neptunium | Tm | [Xe].4f14.5d | 2D<3/2> | (626) | 4 | L8672c99 93 | Neptunium | Er | [Xe].4f14 | 1S0 | (770) | 40 | L582 93 | Neptunium | Ho | [Cd].4f14.5p5 | 2P*<3/2> | (810) | 40 | L582 93 | Neptunium | Dy | [Cd].4f14.5p4 | 3P<2> | (850) | 40 | L582 93 | Neptunium | Tb | [Cd].4f14.5p3 | 2P*<3/2> | (880) | 40 | L582 93 | Neptunium | Gd | [Cd].4f14.5p2 | 3P0 | (980) | 50 | L582 93 | Neptunium | Eu | [Cd].4f14.5p | 2P*<1/2> | (1020) | 50 | L582 93 | Neptunium | Sm | [Cd].4f14 | 1S0 | (1130) | 60 | L582 93 | Neptunium | Pm | [Kr].4d10.4f14.5s | 2S<1/2> | (1170) | 60 | L582 93 | Neptunium | Nd | [Kr].4d10.4f14 | 1S0 | (1280) | 60 | L582 93 | Neptunium | Pr | [Kr].4d10.4f13 | 2F*<7/2> | (1360) | 70 | L582 93 | Neptunium | Ce | [Kr].4d10.4f12 | | (1430) | 70 | L582 93 | Neptunium | La | [Kr].4d10.4f11 | 4I*<15/2> | (1510) | 70 | L582 93 | Neptunium | Ba | [Kr].4d10.4f10 | 5I<8> | (1590) | 80 | L582 93 | Neptunium | Cs | [Kr].4d10.4f9 | 6H*<15/2> | (1670) | 80 | L582 93 | Neptunium | Xe | [Kr].4d10.4f8 | 7F<6> | (1740) | 90 | L582 93 | Neptunium | I | [Kr].4d10.4f7 | 8S*<7/2> | (1820) | 90 | L582 93 | Neptunium | Te | [Kr].4d10.4f6 | 7F0 | (1910) | 100 | L582 93 | Neptunium | Sb | [Kr].4d10.4f5 | 6H*<5/2> | (1990) | 100 | L582 93 | Neptunium | Sn | [Kr].4d10.4f4 | 5I<4> | (2070) | 100 | L582 93 | Neptunium | In | [Kr].4d10.4f3 | 4I*<9/2> | (2140) | 110 | L582 93 | Neptunium | Cd | [Kr].4d10.4f2 | 3H<4> | (2230) | 110 | L582 93 | Neptunium | Ag | [Kr].4d10.4f | 2F*<5/2> | (2310) | 110 | L582 93 | Neptunium | Pd | [Kr].4d10 | 1S0 | (2675) | 4 | L8672c99 93 | Neptunium | Rh | [Kr].4d9 | 2D<5/2> | (2745) | 4 | L8672c99 93 | Neptunium | Ru | [Kr].4d8 | 3F<4> | (2817) | 4 | L8672c99 93 | Neptunium | Tc | [Kr].4d7 | 4F<9/2> | (2894) | 4 | L8672c99 93 | Neptunium | Mo | [Kr].4d6 | 5D<4> | (2969) | 4 | L8672c99 93 | Neptunium | Nb | [Kr].4d5 | <5/2> | (3041) | 4 | L8672c99 93 | Neptunium | Zr | [Kr].4d4 | 5D0 | (3181) | 5 | L8672c99 93 | Neptunium | Y | [Kr].4d3 | 4F<3/2> | (3255) | 5 | L8672c99 93 | Neptunium | Sr | [Kr].4d2 | 3F<2> | (3338) | 5 | L8672c99 93 | Neptunium | Rb | [Kr].4d | 2D<3/2> | (3413) | 5 | L8672c99 93 | Neptunium | Kr | [Ar].3d10.4s2.4p6 | 1S0 | (3718) | 6 | L8672c99 93 | Neptunium | Br | [Ar].3d10.4s2.4p5 | 2P*<3/2> | (3792) | 6 | L8672c99 93 | Neptunium | Se | [Ar].3d10.4s2.4p4 | 3P<2> | (3872) | 7 | L8672c99 93 | Neptunium | As | [Ar].3d10.4s2.4p3 | *<3/2> | (3947) | 10 | L8672c99 93 | Neptunium | Ge | [Ar].3d10.4s2.4p2 | 3P0 | (4353) | 12 | L8672c99 93 | Neptunium | Ga | [Ar].3d10.4s2.4p | 2P*<1/2> | (4441) | 15 | L8672c99 93 | Neptunium | Zn | [Ar].3d10.4s2 | 1S0 | (4658) | 19 | L8672c99 93 | Neptunium | Cu | [Ar].3d10.4s | 2S<1/2> | (4744) | 24 | L8672c99 93 | Neptunium | Ni | [Ar].3d10 | 1S0 | (7610) | 30 | L8672c99 93 | Neptunium | Co | [Ar].3d9 | 2D<5/2> | (7770) | 40 | L8672c99 93 | Neptunium | Fe | [Ar].3d8 | 3F<4> | (7950) | 40 | L8672c99 93 | Neptunium | Mn | [Ar].3d7 | 4F<9/2> | (8130) | 50 | L8672c99 93 | Neptunium | Cr | [Ar].3d6 | <4> | (8310) | 50 | L8672c99 93 | Neptunium | V | [Ar].3d5 | <5/2> | (8480) | 60 | L8672c99 93 | Neptunium | Ti | [Ar].3d4 | 5D0 | (8890) | 60 | L8672c99 93 | Neptunium | Sc | [Ar].3d3 | 4F<3/2> | (9070) | 70 | L8672c99 93 | Neptunium | Ca | [Ar].3d2 | 3F<2> | (9270) | 90 | L8672c99 93 | Neptunium | K | [Ar].3d | 2D<3/2> | (9450) | 90 | L8672c99 93 | Neptunium | Ar | [Ne].3s2.3p6 | 1S0 | (9970) | 100 | L8672c99 93 | Neptunium | Cl | [Ne].3s2.3p5 | 2P*<3/2> | (10130) | 110 | L8672c99 93 | Neptunium | S | [Ne].3s2.3p4 | 3P<2> | (10300) | 120 | L8672c99 93 | Neptunium | P | [Ne].3s2.3p3 | 2P*<3/2> | (10470) | 120 | L8672c99 93 | Neptunium | Si | [Ne].3s2.3p2 | 3P0 | (11730) | 140 | L8672c99 93 | Neptunium | Al | [Ne].3s2.3p | 2P*<1/2> | (11930) | 150 | L8672c99 93 | Neptunium | Mg | [Ne].3s2 | 1S0 | (12320) | 160 | L8672c99 93 | Neptunium | Na | [Ne].3s | 2S<1/2> | (12500) | 170 | L8672c99 93 | Neptunium | Ne | 1s2.2s2.2p6 | 1S0 | (25870) | 190 | L8672c99 93 | Neptunium | F | 1s2.2s2.2p5 | 2P*<3/2> | (26300) | 200 | L8672c99 93 | Neptunium | O | 1s2.2s2.2p4 | 3P<2> | (26770) | 220 | L8672c99 93 | Neptunium | N | 1s2.2s2.2p3 | (0,3/2)*<3/2> | (27210) | 240 | L8672c99 93 | Neptunium | C | 1s2.2s2.2p2 | 3P0 | (31910) | 250 | L8672c99 93 | Neptunium | B | 1s2.2s2.2p | 2P*<1/2> | (32500) | 300 | L8672c99 93 | Neptunium | Be | 1s2.2s2 | 1S0 | (33300) | 300 | L8672c99 93 | Neptunium | Li | 1s2.2s | 2S<1/2> | (33722.2) | 0.7 | L16264c99 93 | Neptunium | He | 1s2 | 1S0 | (132911) | 3 | L12128 93 | Neptunium | H | 1s | 2S<1/2> | (135202) | 4 | 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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