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| Ion | No. of levels |
|---|
| At I | 4 |
| At II | 2 |
| At III | 2 |
| At IV | 2 |
| At V | 2 |
| At VI | 2 |
| At VII | 2 |
| At VIII | 2 |
| At IX | 2 |
| At X | 2 |
| At XI | 2 |
| At XII | 2 |
| At XIII | 2 |
| At XIV | 2 |
| At XV | 2 |
| At XVI | 2 |
| At XVII | 2 |
| At XVIII | 2 |
| At XIX | 2 |
| At XX | 2 |
| At XXI | 2 |
| At XXII | 2 |
| At XXIII | 2 |
| At XXIV | 2 |
| At XXV | 2 |
| At XXVI | 2 |
| At XXVII | 2 |
| At XXVIII | 2 |
| At XXIX | 2 |
| At XXX | 2 |
| At XXXI | 2 |
| At XXXII | 2 |
| At XXXIII | 2 |
| At XXXIV | 2 |
| At XXXV | 2 |
| At XXXVI | 2 |
| At XXXVII | 2 |
| At XXXVIII | 2 |
| At XXXIX | 2 |
| At XL | 2 |
| At XLI | 2 |
| At XLII | 2 |
| At XLIII | 2 |
| At XLIV | 2 |
| At XLV | 2 |
| At XLVI | 2 |
| At XLVII | 2 |
| At XLVIII | 2 |
| At XLIX | 2 |
| At L | 2 |
| At LI | 2 |
| At LII | 2 |
| At LIII | 2 |
| At LIV | 2 |
| At LV | 2 |
| At LVI | 2 |
| At LVII | 2 |
| At LVIII | 2 |
| At LIX | 2 |
| At LX | 2 |
| At LXI | 2 |
| At LXII | 2 |
| At LXIII | 2 |
| At LXIV | 2 |
| At LXV | 2 |
| At LXVI | 2 |
| At LXVII | 2 |
| At LXVIII | 2 |
| At LXIX | 2 |
| At LXX | 2 |
| At LXXI | 2 |
| At LXXII | 2 |
| At LXXIII | 2 |
| At LXXIV | 2 |
| At LXXV | 2 |
| At LXXVI | 2 |
| At LXXVII | 2 |
| At LXXVIII | 2 |
| At LXXIX | 2 |
| At LXXX | 2 |
| At LXXXI | 2 |
| At LXXXII | 2 |
| At LXXXIII | 20 |
| At LXXXIV | 39 |
| At LXXXV | 10 |
| Total for At: | 235 |