NIST Atomic Spectra Database Ionization Energies Data
Fr (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 2]. 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 --------|----------|-------------|--------------------|-----------------|--------------------------------------|----------------------|----------- 87 | Francium | Fr | [Rn].7s | 2S<1/2> | 4.0727411 | 0.0000011 | L10714 87 | Francium | Rn | [Hg].6p6 | 1S0 | [22.4] | 1.9 | L16139 87 | Francium | At | [Hg].6p5 | 2P*<3/2> | [33.5] | 1.5 | L16139 87 | Francium | Po | [Hg].6p4 | 3P<2> | (39.1) | 1.7 | L8672c99 87 | Francium | Bi | [Hg].6p3 | 4S*<3/2> | (50.0) | 1.9 | L8672c99 87 | Francium | Pb | [Hg].6p2 | 3P0 | (67.0) | 2.0 | L8672c99 87 | Francium | Tl | [Hg].6p | 2P*<1/2> | (80.0) | 2.0 | L8672c99 87 | Francium | Hg | [Xe].4f14.5d10.6s2 | 1S0 | (106.0) | 2.1 | L8672c99 87 | Francium | Au | [Xe].4f14.5d10.6s | 2S<1/2> | (120.0) | 2.2 | L8672c99 87 | Francium | Pt | [Xe].4f14.5d10 | 1S0 | (179.0) | 2.2 | L8672c99 87 | Francium | Ir | [Xe].4f14.5d9 | 2D<5/2> | (200.0) | 2.4 | L8672c99 87 | Francium | Os | [Xe].4f14.5d8 | 3F<4> | (222.1) | 2.5 | L8672c99 87 | Francium | Re | [Xe].4f14.5d7 | 4F<9/2> | (245) | 3 | L8672c99 87 | Francium | W | [Xe].4f14.5d6 | 5D<4> | (269) | 3 | L8672c99 87 | Francium | Ta | [Xe].4f14.5d5 | 6S<5/2> | (293) | 3 | L8672c99 87 | Francium | Hf | [Xe].4f14.5d4 | 5D0 | (324) | 3 | L8672c99 87 | Francium | Lu | [Xe].4f14.5d3 | 4F<3/2> | (349) | 3 | L8672c99 87 | Francium | Yb | [Xe].4f14.5d2 | 3F<2> | (375) | 3 | L8672c99 87 | Francium | Tm | [Xe].4f14.5d | 2D<3/2> | (400) | 3 | L8672c99 87 | Francium | Er | [Xe].4f14 | 1S0 | (530) | 30 | L582 87 | Francium | Ho | [Cd].4f14.5p5 | 2P*<3/2> | (560) | 30 | L582 87 | Francium | Dy | [Cd].4f14.5p4 | 3P<2> | (590) | 30 | L582 87 | Francium | Tb | [Cd].4f14.5p3 | 2P*<3/2> | (620) | 30 | L582 87 | Francium | Gd | [Cd].4f14.5p2 | 3P0 | (690) | 30 | L582 87 | Francium | Eu | [Cd].4f14.5p | 2P*<1/2> | (720) | 40 | L582 87 | Francium | Sm | [Cd].4f14 | 1S0 | (810) | 40 | L582 87 | Francium | Pm | [Kr].4d10.4f14.5s | 2S<1/2> | (850) | 40 | L582 87 | Francium | Nd | [Kr].4d10.4f14 | 1S0 | (910) | 50 | L582 87 | Francium | Pr | [Kr].4d10.4f13 | 2F*<7/2> | (980) | 50 | L582 87 | Francium | Ce | [Kr].4d10.4f12 | | (1040) | 50 | L582 87 | Francium | La | [Kr].4d10.4f11 | 4I*<15/2> | (1110) | 50 | L582 87 | Francium | Ba | [Kr].4d10.4f10 | 5I<8> | (1180) | 60 | L582 87 | Francium | Cs | [Kr].4d10.4f9 | 6H*<15/2> | (1250) | 60 | L582 87 | Francium | Xe | [Kr].4d10.4f8 | 7F<6> | (1320) | 70 | L582 87 | Francium | I | [Kr].4d10.4f7 | 8S*<7/2> | (1380) | 70 | L582 87 | Francium | Te | [Kr].4d10.4f6 | 7F0 | (1460) | 70 | L582 87 | Francium | Sb | [Kr].4d10.4f5 | 6H*<5/2> | (1530) | 80 | L582 87 | Francium | Sn | [Kr].4d10.4f4 | 5I<4> | (1600) | 80 | L582 87 | Francium | In | [Kr].4d10.4f3 | 4I*<9/2> | (1670) | 90 | L582 87 | Francium | Cd | [Kr].4d10.4f2 | 3H<4> | (1740) | 90 | L582 87 | Francium | Ag | [Kr].4d10.4f | 2F*<5/2> | (1810) | 90 | L582 87 | Francium | Pd | [Kr].4d10 | 1S0 | (2119) | 4 | L8672c99 87 | Francium | Rh | [Kr].4d9 | 2D<5/2> | (2182) | 4 | L8672c99 87 | Francium | Ru | [Kr].4d8 | 3F<4> | (2247) | 4 | L8672c99 87 | Francium | Tc | [Kr].4d7 | 4F<9/2> | (2317) | 4 | L8672c99 87 | Francium | Mo | [Kr].4d6 | 5D<4> | (2384) | 4 | L8672c99 87 | Francium | Nb | [Kr].4d5 | <5/2> | (2450) | 4 | L8672c99 87 | Francium | Zr | [Kr].4d4 | 5D0 | (2564) | 4 | L8672c99 87 | Francium | Y | [Kr].4d3 | 4F<3/2> | (2631) | 4 | L8672c99 87 | Francium | Sr | [Kr].4d2 | 3F<2> | (2706) | 4 | L8672c99 87 | Francium | Rb | [Kr].4d | 2D<3/2> | (2774) | 4 | L8672c99 87 | Francium | Kr | [Ar].3d10.4s2.4p6 | 1S0 | (3049) | 4 | L8672c99 87 | Francium | Br | [Ar].3d10.4s2.4p5 | 2P*<3/2> | (3115) | 4 | L8672c99 87 | Francium | Se | [Ar].3d10.4s2.4p4 | 3P<2> | (3190) | 5 | L8672c99 87 | Francium | As | [Ar].3d10.4s2.4p3 | *<3/2> | (3257) | 5 | L8672c99 87 | Francium | Ge | [Ar].3d10.4s2.4p2 | 3P0 | (3556) | 5 | L8672c99 87 | Francium | Ga | [Ar].3d10.4s2.4p | 2P*<1/2> | (3635) | 5 | L8672c99 87 | Francium | Zn | [Ar].3d10.4s2 | 1S0 | (3828) | 6 | L8672c99 87 | Francium | Cu | [Ar].3d10.4s | 2S<1/2> | [3907] | 4 | L10278 87 | Francium | Ni | [Ar].3d10 | 1S0 | (6365) | 7 | L8672c99 87 | Francium | Co | [Ar].3d9 | 2D<5/2> | (6516) | 10 | L8672c99 87 | Francium | Fe | [Ar].3d8 | 3F<4> | (6678) | 12 | L8672c99 87 | Francium | Mn | [Ar].3d7 | 4F<9/2> | (6849) | 15 | L8672c99 87 | Francium | Cr | [Ar].3d6 | <4> | (7013) | 19 | L8672c99 87 | Francium | V | [Ar].3d5 | <5/2> | (7172) | 24 | L8672c99 87 | Francium | Ti | [Ar].3d4 | 5D0 | (7500) | 30 | L8672c99 87 | Francium | Sc | [Ar].3d3 | 4F<3/2> | (7670) | 40 | L8672c99 87 | Francium | Ca | [Ar].3d2 | 3F<2> | (7850) | 40 | L8672c99 87 | Francium | K | [Ar].3d | 2D<3/2> | (8020) | 50 | L8672c99 87 | Francium | Ar | [Ne].3s2.3p6 | 1S0 | (8500) | 50 | L8672c99 87 | Francium | Cl | [Ne].3s2.3p5 | 2P*<3/2> | (8640) | 60 | L8672c99 87 | Francium | S | [Ne].3s2.3p4 | 3P<2> | (8800) | 60 | L8672c99 87 | Francium | P | [Ne].3s2.3p3 | 2P*<3/2> | (8950) | 70 | L8672c99 87 | Francium | Si | [Ne].3s2.3p2 | 3P0 | (9890) | 90 | L8672c99 87 | Francium | Al | [Ne].3s2.3p | 2P*<1/2> | (10070) | 90 | L8672c99 87 | Francium | Mg | [Ne].3s2 | 1S0 | (10420) | 100 | L8672c99 87 | Francium | Na | [Ne].3s | 2S<1/2> | (10590) | 110 | L8672c99 87 | Francium | Ne | 1s2.2s2.2p6 | 1S0 | (22330) | 120 | L8672c99 87 | Francium | F | 1s2.2s2.2p5 | 2P*<3/2> | (22730) | 120 | L8672c99 87 | Francium | O | 1s2.2s2.2p4 | 3P<2> | (23170) | 140 | L8672c99 87 | Francium | N | 1s2.2s2.2p3 | (0,3/2)*<3/2> | (23570) | 150 | L8672c99 87 | Francium | C | 1s2.2s2.2p2 | 3P0 | (27060) | 160 | L8672c99 87 | Francium | B | 1s2.2s2.2p | 2P*<1/2> | (27590) | 170 | L8672c99 87 | Francium | Be | 1s2.2s2 | 1S0 | (28260) | 190 | L8672c99 87 | Francium | Li | 1s2.2s | 2S<1/2> | (28683.4) | 0.5 | L16264c99 87 | Francium | He | 1s2 | 1S0 | (113821.9) | 0.5 | L21139 87 | Francium | H | 1s | 2S<1/2> | (115857.5) | 0.7 | 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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