Tempoh 6.
Sesium
55
Barium
56
Lantanum
57
Serium
58
Praseodimium
59
Neodimium
60
Prometium
61
Samarium
62
Europium
63
Gadolinium
64
Terbium
65
Disprosium
66
Holmium
67
Erbium
68
Tulium
69
Iterbium
70
Lutetium
71
Hafnium
72
Tantalum
73
Tungsten
74
Renium
75
Osmium
76
Iridium
77
Platinum
78
Emas
79
Raksa
80
Talium
81
Plumbum
82
Bismut
83
Polonium
84
Astatin
85
Radon
86
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