REE 101
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<— LIGHT REE —
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| 57La | 58Ce | 59Pr | 60Nd | 62Pm | 61Sm |
| Lanthanum | Cerium | Praseodymium | Neodymium | Promethium | Samarium |
| — HEAVY REE —> | ||||||||||
| 62Eu | 63Gd | 64Tb | 65Dy | 66Ho | 67Er | 68Tm | 69Yb | 70Lu | 21Sc | 39Y |
| Europium | Gadolinium | Terbium | Dysprosium | Holmium | Erbium | Thulium | Ytterbium | Lutetium | Scandium | Yttrium |