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NIST Atomic Spectra Database Ionization Energies Data
Bk (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, February 17]. 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 --------|-----------|-------------|--------------------|-----------------|--------------------------------------|----------------------|----------- 97 | Berkelium | Bk | [Rn].5f9.7s2 | 6H*<15/2> | 6.19785 | 0.00025 | L15992 97 | Berkelium | Cm | [Rn].5f9.7s | 7H*<8> | [11.9] | 0.4 | L13741c99 97 | Berkelium | Am | [Rn].5f9 | 6H*<15/2> | [21.6] | 0.4 | L13741c99 97 | Berkelium | Pu | [Rn].5f8 | 7F<6> | [36.0] | 0.4 | L13741c99 97 | Berkelium | Np | [Rn].5f7 | 8S*<7/2> | (56.0) | 1.9 | L8672c99 97 | Berkelium | U | [Rn].5f6 | 7F0 | (70.1) | 2.0 | L8672c99 97 | Berkelium | Pa | [Rn].5f5 | 6H*<5/2> | (90.0) | 2.0 | L8672c99 97 | Berkelium | Th | [Rn].5f4 | 5I<4> | (114) | 6 | L582 97 | Berkelium | Ac | [Hg].5f6.6p3 | * | (130) | 6 | L582 97 | Berkelium | Ra | [Hg].5f6.6p2 | | (147) | 7 | L582 97 | Berkelium | Fr | [Hg].5f5.6p2 | * | (171) | 9 | L582 97 | Berkelium | Rn | [Hg].5f4.6p2 | | (195) | 10 | L582 97 | Berkelium | At | [Hg].5f3.6p2 | * | (218) | 11 | L582 97 | Berkelium | Po | [Hg].5f2.6p2 | | (240) | 12 | L582 97 | Berkelium | Bi | [Hg].5f2.6p | * | (259) | 12 | L582 97 | Berkelium | Pb | [Hg].5f2 | | (279) | 14 | L582 97 | Berkelium | Tl | [Hg].5f | 2F*<5/2> | (303) | 15 | L582 97 | Berkelium | Hg | [Xe].4f14.5d10.6s2 | 1S0 | (339) | 3 | L8672c99 97 | Berkelium | Au | [Xe].4f14.5d10.6s | 2S<1/2> | (361) | 3 | L8672c99 97 | Berkelium | Pt | [Xe].4f14.5d10 | 1S0 | (497) | 4 | L8672c99 97 | Berkelium | Ir | [Xe].4f14.5d9 | 2D<5/2> | (526) | 4 | L8672c99 97 | Berkelium | Os | [Xe].4f14.5d8 | 3F<4> | (557) | 4 | L8672c99 97 | Berkelium | Re | [Xe].4f14.5d7 | 4F<9/2> | (590) | 4 | L8672c99 97 | Berkelium | W | [Xe].4f14.5d6 | 5D<4> | (621) | 4 | L8672c99 97 | Berkelium | Ta | [Xe].4f14.5d5 | 6S<5/2> | (652) | 4 | L8672c99 97 | Berkelium | Hf | [Xe].4f14.5d4 | 5D0 | (700) | 4 | L8672c99 97 | Berkelium | Lu | [Xe].4f14.5d3 | 4F<3/2> | (733) | 4 | L8672c99 97 | Berkelium | Yb | [Xe].4f14.5d2 | 3F<2> | (768) | 4 | L8672c99 97 | Berkelium | Tm | [Xe].4f14.5d | 2D<3/2> | (800) | 4 | L8672c99 97 | Berkelium | Er | [Xe].4f14 | 1S0 | (960) | 50 | L582 97 | Berkelium | Ho | [Cd].4f14.5p5 | 2P*<3/2> | (1000) | 50 | L582 97 | Berkelium | Dy | [Cd].4f14.5p4 | 3P<2> | (1040) | 50 | L582 97 | Berkelium | Tb | [Cd].4f14.5p3 | 2P*<3/2> | (1080) | 50 | L582 97 | Berkelium | Gd | [Cd].4f14.5p2 | 3P0 | (1200) | 60 | L582 97 | Berkelium | Eu | [Cd].4f14.5p | 2P*<1/2> | (1240) | 60 | L582 97 | Berkelium | Sm | [Cd].4f14 | 1S0 | (1360) | 70 | L582 97 | Berkelium | Pm | [Kr].4d10.4f14.5s | 2S<1/2> | (1410) | 70 | L582 97 | Berkelium | Nd | [Kr].4d10.4f14 | 1S0 | (1550) | 80 | L582 97 | Berkelium | Pr | [Kr].4d10.4f13 | 2F*<7/2> | (1630) | 80 | L582 97 | Berkelium | Ce | [Kr].4d10.4f12 | | (1720) | 90 | L582 97 | Berkelium | La | [Kr].4d10.4f11 | 4I*<15/2> | (1800) | 90 | L582 97 | Berkelium | Ba | [Kr].4d10.4f10 | 5I<8> | (1890) | 90 | L582 97 | Berkelium | Cs | [Kr].4d10.4f9 | 6H*<15/2> | (1970) | 100 | L582 97 | Berkelium | Xe | [Kr].4d10.4f8 | 7F<6> | (2050) | 100 | L582 97 | Berkelium | I | [Kr].4d10.4f7 | 8S*<7/2> | (2140) | 110 | L582 97 | Berkelium | Te | [Kr].4d10.4f6 | 7F0 | (2240) | 110 | L582 97 | Berkelium | Sb | [Kr].4d10.4f5 | 6H*<5/2> | (2320) | 120 | L582 97 | Berkelium | Sn | [Kr].4d10.4f4 | 5I<4> | (2410) | 120 | L582 97 | Berkelium | In | [Kr].4d10.4f3 | 4I*<9/2> | (2490) | 120 | L582 97 | Berkelium | Cd | [Kr].4d10.4f2 | 3H<4> | (2580) | 120 | L582 97 | Berkelium | Ag | [Kr].4d10.4f | 2F*<5/2> | (2670) | 140 | L582 97 | Berkelium | Pd | [Kr].4d10 | 1S0 | (3080) | 4 | L8672c99 97 | Berkelium | Rh | [Kr].4d9 | 2D<5/2> | (3154) | 4 | L8672c99 97 | Berkelium | Ru | [Kr].4d8 | 3F<4> | (3232) | 5 | L8672c99 97 | Berkelium | Tc | [Kr].4d7 | 4F<9/2> | (3315) | 5 | L8672c99 97 | Berkelium | Mo | [Kr].4d6 | 5D<4> | (3393) | 5 | L8672c99 97 | Berkelium | Nb | [Kr].4d5 | (0,5/2)<5/2> | (3469) | 5 | L8672c99 97 | Berkelium | Zr | [Kr].4d4 | 5D0 | (3630) | 6 | L8672c99 97 | Berkelium | Y | [Kr].4d3 | 4F<3/2> | (3709) | 6 | L8672c99 97 | Berkelium | Sr | [Kr].4d2 | 3F<2> | (3797) | 7 | L8672c99 97 | Berkelium | Rb | [Kr].4d | 2D<3/2> | (3877) | 10 | L8672c99 97 | Berkelium | Kr | [Ar].3d10.4s2.4p6 | 1S0 | (4202) | 12 | L8672c99 97 | Berkelium | Br | [Ar].3d10.4s2.4p5 | 2P*<3/2> | (4281) | 15 | L8672c99 97 | Berkelium | Se | [Ar].3d10.4s2.4p4 | 3P<2> | (4365) | 19 | L8672c99 97 | Berkelium | As | [Ar].3d10.4s2.4p3 | (0,3/2)*<3/2> | (4445) | 24 | L8672c99 97 | Berkelium | Ge | [Ar].3d10.4s2.4p2 | 3P0 | (4940) | 30 | L8672c99 97 | Berkelium | Ga | [Ar].3d10.4s2.4p | 2P*<1/2> | (5040) | 40 | L8672c99 97 | Berkelium | Zn | [Ar].3d10.4s2 | 1S0 | (5270) | 40 | L8672c99 97 | Berkelium | Cu | [Ar].3d10.4s | 2S<1/2> | (5360) | 50 | L8672c99 97 | Berkelium | Ni | [Ar].3d10 | 1S0 | (8500) | 50 | L8672c99 97 | Berkelium | Co | [Ar].3d9 | 2D<5/2> | (8670) | 60 | L8672c99 97 | Berkelium | Fe | [Ar].3d8 | 3F<4> | (8850) | 60 | L8672c99 97 | Berkelium | Mn | [Ar].3d7 | 4F<9/2> | (9050) | 70 | L8672c99 97 | Berkelium | Cr | [Ar].3d6 | (0,4)<4> | (9240) | 90 | L8672c99 97 | Berkelium | V | [Ar].3d5 | (0,5/2)<5/2> | (9420) | 90 | L8672c99 97 | Berkelium | Ti | [Ar].3d4 | 5D0 | (9880) | 100 | L8672c99 97 | Berkelium | Sc | [Ar].3d3 | 4F<3/2> | (10070) | 110 | L8672c99 97 | Berkelium | Ca | [Ar].3d2 | 3F<2> | (10280) | 120 | L8672c99 97 | Berkelium | K | [Ar].3d | 2D<3/2> | (10480) | 120 | L8672c99 97 | Berkelium | Ar | [Ne].3s2.3p6 | 1S0 | (11020) | 140 | L8672c99 97 | Berkelium | Cl | [Ne].3s2.3p5 | 2P*<3/2> | (11190) | 150 | L8672c99 97 | Berkelium | S | [Ne].3s2.3p4 | 3P<2> | (11380) | 160 | L8672c99 97 | Berkelium | P | [Ne].3s2.3p3 | 2P*<3/2> | (11550) | 170 | L8672c99 97 | Berkelium | Si | [Ne].3s2.3p2 | 3P0 | (13090) | 190 | L8672c99 97 | Berkelium | Al | [Ne].3s2.3p | 2P*<1/2> | (13300) | 200 | L8672c99 97 | Berkelium | Mg | [Ne].3s2 | 1S0 | (13720) | 220 | L8672c99 97 | Berkelium | Na | [Ne].3s | 2S<1/2> | (13910) | 240 | L8672c99 97 | Berkelium | Ne | 1s2.2s2.2p6 | 1S0 | (28380) | 250 | L8672c99 97 | Berkelium | F | 1s2.2s2.2p5 | 2P*<3/2> | (28800) | 300 | L8672c99 97 | Berkelium | O | 1s2.2s2.2p4 | 3P<2> | (29300) | 300 | L8672c99 97 | Berkelium | N | 1s2.2s2.2p3 | (0,3/2)*<3/2> | (29800) | 300 | L8672c99 97 | Berkelium | C | 1s2.2s2.2p2 | 3P0 | (35500) | 300 | L8672c99 97 | Berkelium | B | 1s2.2s2.2p | 2P*<1/2> | (36200) | 400 | L8672c99 97 | Berkelium | Be | 1s2.2s2 | 1S0 | (37000) | 400 | L8672c99 97 | Berkelium | Li | 1s2.2s | 2S<1/2> | (37457.6) | 0.9 | L16264c99 97 | Berkelium | He | 1s2 | 1S0 | (146917) | 5 | L12128 97 | Berkelium | H | 1s | 2S<1/2> | (149398) | 5 | 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
If you did not find the data you need, please inform the ASD Team.
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