Data:First ionization energies of the elements

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Further information: Ionization energy

Data are taken from the wavenumber compilation of Moore (1970) unless otherwise noted, and converted using the 2006 CODATA recommended values:[1][Note 1]

1 cm−1 = 0.000 123 984 1875(31) eV = 0.011 903 713 931(12) kJ mol−1
Z Element Ionization energy Ref.
(eV) (kJ mol−1)
1 Hydrogen 13.598 432 44(36) 1305.584 631(12)
2 Helium 24.587 3985(14) 2360.634 56(12)
3 Lithium 5.391 718 96(64) 517.658 593(60)
4 Beryllium 9.322 6277(13) 895.064 89(12)
5 Boron 8.298 024(18) 800.6377(17) [2][3]
6 Carbon 11.260 296(12) 796.6930(12)
7 Nitrogen 14.534 096(12) 1395.4176(12)
8 Oxygen 13.618 0537(74) 1307.468 47(71)
9 Fluorine 17.422 816(50) 1672.7634(48)
10 Neon [Note 2]
11 Sodium 5.137 9515(37) 493.295 10(36)
89 Actinium 5.3807(3) [4]
90 Thorium 6.3067(2) [5]
93 Neptunium 6.2655(2) [5]
94 Plutonium 6.0258(2) [5]
95 Americium 5.9738(2) [5][6][7]
96 Curium 5.9915(2) [5][6][7]
97 Berkelium 6.1979(2) 598.01(2) [5][7]
98 Californium 6.2817(2) [5][7]
99 Einsteinium 6.3676(5) [7][8]

Notes

  1. ↑ Moore used the conversion factor 1 cm−1 = 0.000 123 981 eV, which is 26 ppm lower than the current value. Moore's value in electronvolts are widely reprinted without correction.
  2. ↑ The results from Moore (1970) were also used in evaluating the weighted mean.

References

Moore, Charlotte E. Ionization potentials and ionization limits derived from the analyses of optical spectra. Natl. Stand. Ref. Data Ser., (U.S. Natl. Bur. Stand.) 1970, 34, 1–22, <http://www.nist.gov/data/nsrds/NSRDS-NBS34.pdf>.

  1. ↑ Mohr, Peter J.; Taylor, Barry N.; Newell, David B. CODATA Recommended Values of the Fundamental Physical Constants: 2006. Rev. Mod. Phys. 2008, 80 (2), 633–730. doi:10.1103/RevModPhys.80.633, <http://physics.nist.gov/cuu/Constants/codata.pdf>.
  2. ↑ Edlén, B.; Ölme, A.; Herzberg, G.; Johns, J. W. C. Ionization Potential of Boron, and the Isotopic and Fine Structure of 2s2p2 2D. J. Opt. Soc. Am. 1970, 60 (7), 889–91. DOI: 10.1364/JOSA.60.000889.
  3. ↑ Brown, C. M.; Tilford, S. G.; Ginter, M. L. Absorption spectrum of B I in the 1350–1900-Å region. J. Opt. Soc. Am. 1974, 64 (6), 877–79. DOI: 10.1364/JOSA.64.000877.
  4. ↑ Backe, H.; Dretzke, A.; Eberhardt, K.; Fritzsche, S.; Kube, G.; Gwinner, G.; Haire, R. G.; Huber, G., et al. First Determination of the Ionization Potential of Actinium and First Observation of Optical Transitions in Fermium. J. Nucl. Sci. Technol. 2002, 86–89.
  5. ↑ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 Köhler, S.; Deißenberger, R.; Eberhardt, K.; Erdmann, N.; Herrmann, G.; Huber, G.; Kratz, J. V.; Nunnemann, M., et al. Determination of the first ionization potential of actinide elements by resonance ionization mass spectroscopy. Spectrochim. Acta, Part B 1997, 52 (6), 717–26. DOI: 10.1016/S0584-8547(96)01670-9.
  6. ↑ 6.0 6.1 Deissenberger, Rüdiger; Köhler, Stefan; Ames, Friedhelm; Eberhardt, Klaus; Erdmann, Nicole; Funk, Heike; Herrmann, Günter; Kluge, Heinz-Jürgen, et al. First Determination of the Ionization Potential of Americium and Curium. Angew. Chem., Int. Ed. Engl. 1995, 34 (7), 814–15. DOI: 10.1002/anie.199508141.
  7. ↑ 7.0 7.1 7.2 7.3 7.4 Erdmann, N.; Nunnemann, M.; Eberhardt, K.; Herrmann, G.; Huber, G.; Köhler, S.; Kratz, J. V.; Passler, G., et al. Determination of the first ionization potential of nine actinide elements by resonance ionization mass spectroscopy (RIMS). J. Alloys Compd. 1998, 271–273, 837–40. DOI: 10.1016/S0925-8388(98)00229-1.
  8. ↑ Peterson, J. R.; Erdmann, N.; Nunnemann, M.; Eberhardt, K.; Huber, G.; Kratz, J. V.; Passler, G.; Stetzer, O., et al. Determination of the first ionization potential of einsteinium by resonance ionization mass spectroscopy (RIMS). J. Alloys Compd. 1998, 271–273, 876–78. DOI: 10.1016/S0925-8388(98)00238-2.
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