Isotopes of Uranium (U)

Symbol Mass Number Relative Atomic Mass Isotopic Composition
217U 217 217.024370(90)
218U 218 218.023540(30)
219U 219 219.024920(60)
220U 220 220.02472(22)#
221U 221 221.02640(11)#
222U 222 222.02609(11)#
223U 223 223.027740(80)
224U 224 224.027605(27)
225U 225 225.029391(12)
226U 226 226.029339(14)
227U 227 227.031156(18)
228U 228 228.031374(16)
229U 229 229.033506(6)
230U 230 230.033940(5)
231U 231 231.036294(3)
232U 232 232.0371562(24)
233U 233 233.0396352(29)
234U 234 234.0409521(20) 0.000054(5)
235U 235 235.0439299(20) 0.007204(6)
236U 236 236.0455680(20)
237U 237 237.0487302(20)
238U 238 238.0507882(20) 0.992742(10)
239U 239 239.0542933(21)
240U 240 240.056592(6)
241U 241 241.06033(32)#
242U 242 242.06293(22)#

Legend

Mass Number
Relative Atomic Mass
Isotopic Composition
Standard Atomic Weight
U: 238.02891(3)
Notes (U)

Isotopic Composition