Terbium
65
Ytterbium
70
Erbium
68
67
Holmium
Lanthanum
57
63
Europium
Samarium
62
Homlium
67
64
Gadolinium
Lutetium
71
65
Terbium
Dysprosium
66
60
Neodymium
Neodymium
60
62
Samarium
57
Lanthanum
Cerium
58
68
Erbium
Praseodymium
59
70
Ytterbium
71
Lutetium
66
Dysprosium
Promethium
61
69
Thulium