Table 4
Sample of table with first, second, and third ionisation energies for atoms and ions (for H and He, the highest possible ionisation stages are singly and doubly ionised, respectively, and therefore the ionisation energy of higher stages are meaningless and are assigned a value of −1 in the table).
| * Atom. Num. | Elem. | IE1 | IE2 | IE3 |
| * | [eV] | [eV] | [eV] | |
|
|
||||
| 1 | H | 13.5984 | –1.000 | –1.000 |
| 2 | He | 24.5874 | 54.418 | –1.000 |
| 3 | Li | 5.3917 | 75.640 | 122.454 |
| 4 | Be | 9.3227 | 18.211 | 153.896 |
| 5 | B | 8.2980 | 25.155 | 37.931 |
| 6 | C | 11.2603 | 24.385 | 47.888 |
| ... | ||||
Notes. The full table is available at the CDS.
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