| Index | Element | I.S. | Z | Conf. | Level | ¡÷E (eV) | Method | Ref. | |
| 1 | Na | F | 11 | 1S22S22P5 | 71.62 | COMP | R1 | ||
| 2 | Na | F | 11 | 2P5 | 2P3/2 | 71.6381 | COMP | R400 | |
| 3 | Na | F | 11 | 2P5 | 2P3/2 | 71.6205 | COMP | R402 | |
| 4 | Na | F | 11 | 2P5 | 2P3/2 | 71.618 | COMP | R325 | |
| 5 | Na | F | 11 | 2P5 | 2P3/2 | 71.618 | 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