Block f elements
The f-block is the two long rows pulled out at the bottom: the lanthanides and actinides. F-block elements are mostly radioactive (in the actinides) and important for magnets, lasers, nuclear fuels and high-tech alloys.
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58
140.116
Ce
Cerium
Lanthanide
59
140.908
Pr
Praseodymium
Lanthanide
60
144.242
Nd
Neodymium
Lanthanide
61
145
Pm
Promethium
Lanthanide
62
150.362
Sm
Samarium
Lanthanide
63
151.964
Eu
Europium
Lanthanide
64
157.253
Gd
Gadolinium
Lanthanide
65
158.925
Tb
Terbium
Lanthanide
66
162.5
Dy
Dysprosium
Lanthanide
67
164.93
Ho
Holmium
Lanthanide
68
167.259
Er
Erbium
Lanthanide
69
168.934
Tm
Thulium
Lanthanide
70
173.045
Yb
Ytterbium
Lanthanide
71
174.967
Lu
Lutetium
Lanthanide
90
232.038
Th
Thorium
Actinide
91
231.036
Pa
Protactinium
Actinide
92
238.029
U
Uranium
Actinide
93
237
Np
Neptunium
Actinide
94
244
Pu
Plutonium
Actinide
95
243
Am
Americium
Actinide
96
247
Cm
Curium
Actinide
97
247
Bk
Berkelium
Actinide
98
251
Cf
Californium
Actinide
99
252
Es
Einsteinium
Actinide
100
257
Fm
Fermium
Actinide
101
258
Md
Mendelevium
Actinide
102
259
No
Nobelium
Actinide
103
262
Lr
Lawrencium
Actinide