f-Block
{count} elements in the f-Block block. These elements share the same outermost electron subshell.
30 elements
57
La
Lanthanum
138.905
58
Ce
Cerium
140.116
59
Pr
Praseodymium
140.908
60
Nd
Neodymium
144.24
61
Pm
Promethium
144.913
62
Sm
Samarium
150.4
63
Eu
Europium
151.964
64
Gd
Gadolinium
157.25
65
Tb
Terbium
158.925
66
Dy
Dysprosium
162.5
67
Ho
Holmium
164.93
68
Er
Erbium
167.26
69
Tm
Thulium
168.934
70
Yb
Ytterbium
173.05
71
Lu
Lutetium
174.967
89
Ac
Actinium
227.028
90
Th
Thorium
232.038
91
Pa
Protactinium
231.036
92
U
Uranium
238.029
93
Np
Neptunium
237.048
94
Pu
Plutonium
244.064
95
Am
Americium
243.061
96
Cm
Curium
247.07
97
Bk
Berkelium
247.07
98
Cf
Californium
251.08
99
Es
Einsteinium
252.083
100
Fm
Fermium
257.095
101
Md
Mendelevium
258.098
102
No
Nobelium
259.101
103
Lr
Lawrencium
266.12
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