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Region of relative stability: radium-226 to einsteinium-252
|
|
|
88
|
89
|
90
|
91
|
92
|
93
|
94
|
95
|
96
|
97
|
98
|
99
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 154
|
|
| Half-life Key
|
| 1
|
10
|
100
|
| 1k
|
10k
|
100k
|
| 1M
|
10M
|
100M
|
| 1G
|
10G
|
(a)
|
|
|
|
|
|
|
250Cm
|
|
252Cf
|
|
|
154
|
| 153
|
|
|
|
|
|
|
|
|
251Cf
|
252Es
|
|
153
|
| 152
|
|
|
|
|
|
|
248Cm
|
|
250Cf
|
|
|
152
|
| 151
|
|
|
|
|
|
|
247Cm
|
248Bk
|
249Cf
|
|
|
151
|
| 150
|
|
|
|
|
244Pu
|
|
246Cm
|
247Bk
|
|
|
|
150
|
| 149
|
|
|
|
|
|
|
|
|
|
245Cm
|
|
|
|
|
149
|
| 148
|
|
|
|
|
|
|
|
242Pu
|
243Am
|
244Cm
|
|
|
|
|
148
|
| 147
|
|
|
|
|
|
|
|
241Pu
|
|
243Cm
|
|
|
|
|
147
|
| 146
|
|
|
|
|
|
238U
|
|
240Pu
|
241Am
|
|
|
|
|
|
146
|
| 145
|
|
|
|
|
|
|
|
239Pu
|
|
|
|
|
|
|
145
|
| 144
|
|
|
|
|
|
236U
|
237Np
|
238Pu
|
|
|
|
|
|
|
144
|
| 143
|
|
|
|
|
|
235U
|
236Np
|
|
|
|
|
|
|
|
143
|
| 142
|
|
|
|
232Th
|
|
234U
|
235Np
|
236Pu
|
|
|
|
|
|
|
142
|
| 141
|
|
|
|
|
|
233U
|
|
|
|
|
|
|
|
|
141
|
| 140
|
|
228Ra
|
|
230Th
|
231Pa
|
232U
|
|
|
|
|
| Table Axes
|
| Neutrons
|
(N)
|
| Protons
|
(Z)
|
|
|
140
|
| 139
|
|
|
|
229Th
|
|
|
|
|
|
|
|
139
|
| 138
|
|
226Ra
|
227Ac
|
228Th
|
|
|
|
|
|
|
|
138
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
88
|
89
|
90
|
91
|
92
|
93
|
94
|
95
|
96
|
97
|
98
|
99
|
|
|
| Only nuclides with a half-life of at least one year are shown on this table.
|
