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Atomic Number 61
Promethium
Atomic Number 62
Samarium
Atomic Number 63
Europium
Atomic Number 64
Gadolinium
Atomic Number 65
Terbium
Atomic Number 66
Dysprosium
Atomic Number 67
Holmium
Atomic Number 68
Erbium
Atomic Number 69
Thulium
Atomic Number 70
Ytterbium