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| Ion | No. of levels |
|---|
| Tl I | 70 |
| Tl II | 82 |
| Tl III | 109 |
| Tl IV | 44 |
| Tl V | 2 |
| Tl VI | 2 |
| Tl VII | 2 |
| Tl VIII | 2 |
| Tl IX | 2 |
| Tl X | 2 |
| Tl XI | 2 |
| Tl XII | 2 |
| Tl XIII | 2 |
| Tl XIV | 2 |
| Tl XV | 2 |
| Tl XVI | 2 |
| Tl XVII | 2 |
| Tl XVIII | 2 |
| Tl XIX | 2 |
| Tl XX | 2 |
| Tl XXI | 2 |
| Tl XXII | 2 |
| Tl XXIII | 2 |
| Tl XXIV | 2 |
| Tl XXV | 2 |
| Tl XXVI | 2 |
| Tl XXVII | 2 |
| Tl XXVIII | 2 |
| Tl XXIX | 2 |
| Tl XXX | 2 |
| Tl XXXI | 2 |
| Tl XXXII | 2 |
| Tl XXXIII | 2 |
| Tl XXXIV | 2 |
| Tl XXXV | 2 |
| Tl XXXVI | 2 |
| Tl XXXVII | 2 |
| Tl XXXVIII | 2 |
| Tl XXXIX | 2 |
| Tl XL | 2 |
| Tl XLI | 2 |
| Tl XLII | 2 |
| Tl XLIII | 2 |
| Tl XLIV | 2 |
| Tl XLV | 2 |
| Tl XLVI | 2 |
| Tl XLVII | 2 |
| Tl XLVIII | 2 |
| Tl XLIX | 2 |
| Tl L | 2 |
| Tl LI | 2 |
| Tl LII | 2 |
| Tl LIII | 2 |
| Tl LIV | 2 |
| Tl LV | 2 |
| Tl LVI | 2 |
| Tl LVII | 2 |
| Tl LVIII | 2 |
| Tl LIX | 2 |
| Tl LX | 2 |
| Tl LXI | 2 |
| Tl LXII | 2 |
| Tl LXIII | 2 |
| Tl LXIV | 2 |
| Tl LXV | 2 |
| Tl LXVI | 2 |
| Tl LXVII | 2 |
| Tl LXVIII | 2 |
| Tl LXIX | 2 |
| Tl LXX | 2 |
| Tl LXXI | 2 |
| Tl LXXII | 2 |
| Tl LXXIII | 2 |
| Tl LXXIV | 2 |
| Tl LXXV | 2 |
| Tl LXXVI | 2 |
| Tl LXXVII | 2 |
| Tl LXXVIII | 2 |
| Tl LXXIX | 20 |
| Tl LXXX | 39 |
| Tl LXXXI | 10 |
| Total for Tl: | 522 |