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Uranium
Protactinium
Thorium
Actinium
Radium
Francium
Radon
Astatine
Polonium
Bismuth
Lead
Thallium
Actinides
Alkali Metals
Alkaline Earth Metals
Halogens
Metalloids
Noble Gases
Poor Metals
Transition Metals
β⁻
U
α
α
β⁻
α
α
α
α
β⁻
β⁻
α
β⁻
α
233
159200
Years
92
Ac
225
89
10 Days
Ra
225
88
15 Days
Th
229
90
7304 Years
Pa
233
91
27 Days
Fr
221
87
5 Minutes
At
217
85
32 Seconds
Bi
213
83
46 Minutes
Bi
209
83
1.9e+19
Years
Po
213
84
4.2e-06
Seconds
Pb
209
82
3.25
Minutes
Tl
209
81
2.2 Minutes
Tl
205
81
Stable
Neptunium
α
Plutonium
α
Americurium
Am
241
95
432 Years
Np
237
93
2.14e-06
Years