Lanthanoid
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Lanthanoid [r]: The group of f-block chemical elements with atomic numbers between 58 (cerium) and 71 (lutetium); named after lanthanum, which immediately precedes the series. [e]
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| Atomic No. | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 |
| Name | La | Ce | Pr | Nd | Pm | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu |
| M3+ f electrons | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |