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| Ion | No. of levels |
|---|
| Ce I | 953 |
| Ce II | 491 |
| Ce III | 227 |
| Ce IV | 17 |
| Ce V | 12 |
| Ce VI | 4 |
| Ce VII | 2 |
| Ce VIII | 2 |
| Ce IX | 2 |
| Ce X | 2 |
| Ce XI | 2 |
| Ce XII | 2 |
| Ce XIII | 2 |
| Ce XIV | 2 |
| Ce XV | 2 |
| Ce XVI | 2 |
| Ce XVII | 2 |
| Ce XVIII | 2 |
| Ce XIX | 2 |
| Ce XX | 2 |
| Ce XXI | 2 |
| Ce XXII | 2 |
| Ce XXIII | 2 |
| Ce XXIV | 2 |
| Ce XXV | 2 |
| Ce XXVI | 2 |
| Ce XXVII | 2 |
| Ce XXVIII | 2 |
| Ce XXIX | 2 |
| Ce XXX | 2 |
| Ce XXXI | 2 |
| Ce XXXII | 2 |
| Ce XXXIII | 2 |
| Ce XXXIV | 2 |
| Ce XXXV | 2 |
| Ce XXXVI | 2 |
| Ce XXXVII | 2 |
| Ce XXXVIII | 2 |
| Ce XXXIX | 2 |
| Ce XL | 2 |
| Ce XLI | 2 |
| Ce XLII | 2 |
| Ce XLIII | 2 |
| Ce XLIV | 2 |
| Ce XLV | 2 |
| Ce XLVI | 2 |
| Ce XLVII | 2 |
| Ce XLVIII | 2 |
| Ce XLIX | 2 |
| Ce L | 2 |
| Ce LI | 2 |
| Ce LII | 2 |
| Ce LIII | 2 |
| Ce LIV | 2 |
| Ce LV | 2 |
| Ce LVI | 20 |
| Ce LVII | 39 |
| Ce LVIII | 10 |
| Total for Ce: | 1871 |