Data:Ionization energies of the elements (Z = 1–30)
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Further information: Ionization energy
| Z | Element | Ionization energy/eV | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| I | II | III | IV | V | VI | VII | VIII | IX | X | ||
| 1 | Hydrogen | 13.598 | |||||||||
| 2 | Helium | 24.587 | 54.416 | ||||||||
| 3 | Lithium | 5.392 | 75.638 | 122.451 | |||||||
| 4 | Beryllium | 9.322 | 18.211 | 155.893 | 217.713 | ||||||
| 5 | Boron | 8.298 | 25.154 | 37.930 | 259.368 | 340.217 | |||||
| 6 | Carbon | 11.260 | 24.383 | 47.887 | 64.492 | 392.077 | 489.981 | ||||
| 7 | Nitrogen | 14.534 | 29.601 | 47.448 | 77.472 | 97.888 | 352.057 | 667.029 | |||
| 8 | Oxygen | 13.618 | 35.116 | 54.934 | 77.412 | 113.896 | 138.116 | 739.315 | 871.387 | ||
| 9 | Fluorine | 17.422 | 34.970 | 62.707 | 87.138 | 114.240 | 157.161 | 185.182 | 953.886 | 1103.089 | |
| 10 | Neon | 21.564 | 40.962 | 63.45 | 97.11 | 126.21 | 157.93 | 207.27 | 239.09 | 1195.797 | 1362.164 |
| 11 | Sodium | 5.139 | 47.286 | 71.64 | 98.91 | 138.39 | 172.15 | 208.47 | 264.18 | 299.87 | 1465.091 |
| 12 | Magnesium | 7.646 | 15.035 | 80.143 | 109.24 | 141.26 | 186.50 | 224.94 | 265.90 | 327.95 | 367.53 |
| 13 | Aluminium | 5.986 | 18.828 | 28.447 | 119.99 | 153.71 | 190.47 | 241.43 | 284.59 | 330.21 | 398.57 |
| 14 | Silicon | 8.151 | 16.345 | 33.492 | 45.141 | 166.77 | 205.05 | 246.52 | 303.17 | 351.10 | 401.43 |
| 15 | Phosphorus | 10.486 | 19.725 | 30.18 | 51.37 | 65.023 | 220.43 | 263.22 | 390.41 | 371.73 | 424.50 |
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>.
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