Index | Element | I.S. |  Z  | Conf. | Level | ¡÷E (eV) | Method | Ref. | |
1 | Na | Ne | 11 | 1S22S22P6 | 45.65 | THR | R50 | ||
2 | Na | Ne | 11 | 2P6 | 1S0 | 47.28697 | 1.3E-04 | COMP | R400 |
3 | Na | Ne | 11 | 2P6 | 1S0 | 47.2867 | 3.E-4 | COMP | R402 |
4 | Na | Ne | 11 | 2P6 | 1S0 | 47.286 | COMP | R325 | |
5 | Na | Ne | 11 | 2P6 | 1S0 | 47.286 | 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