Actinide Elements
There are 15 elements classified as actinide on the periodic table.
89
Ac
Actinium
227
90
Th
Thorium
232.04
91
Pa
Protactinium
231.04
92
U
Uranium
238.03
93
Np
Neptunium
237
94
Pu
Plutonium
244
95
Am
Americium
243
96
Cm
Curium
247
97
Bk
Berkelium
247
98
Cf
Californium
251
99
Es
Einsteinium
252
100
Fm
Fermium
257
101
Md
Mendelevium
258
102
No
Nobelium
259
103
Lr
Lawrencium
266