Index | Element | I.S. |  Z  | Conf. | Level | ¡÷E (eV) | Method | Ref. | |
1 | Na | O | 11 | 1S22S22P4 | 97.19 | THR | R50 | ||
2 | Na | O | 11 | 2P4 | 3P2 | 98.91463 | COMP | R400 | |
3 | Na | O | 11 | 2P4 | 3P2 | 98.92 | COMP | R402 | |
4 | Na | O | 11 | 2P4 | 3P2 | 98.91 | COMP | R325 | |
5 | Na | O | 11 | 2P4 | 3P2 | 98.91 | COMP | R408 |
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'I.S.' ---------- the isoelectronic sequence
'Z' ---------- atomic number
'Conf.' ---------- configuration
'Level' ---------- the notation of energy level
'E' ---------- the ionization potential
'¡÷E' ---------- error for ionization potential
'Method' ---------- the method by which the data is produced
'Ref.' ---------- the reference