Isotopes of Thorium (Th)

Symbol Mass Number Relative Atomic Mass Isotopic Composition
209Th 209 209.01772(11)
210Th 210 210.015075(27)
211Th 211 211.014930(80)
212Th 212 212.012980(20)
213Th 213 213.013010(80)
214Th 214 214.011500(18)
215Th 215 215.011730(29)
216Th 216 216.011062(14)
217Th 217 217.013114(22)
218Th 218 218.013284(14)
219Th 219 219.015540(50)
220Th 220 220.015748(24)
221Th 221 221.018184(10)
222Th 222 222.018468(13)
223Th 223 223.020811(10)
224Th 224 224.021467(12)
225Th 225 225.023951(5)
226Th 226 226.024903(5)
227Th 227 227.0277041(27)
228Th 228 228.0287411(24)
229Th 229 229.031762(3)
230Th 230 230.0331338(19)
231Th 231 231.0363043(19)
232Th 232 232.0380553(21) 1.0000
233Th 233 233.0415818(21)
234Th 234 234.043601(4)
235Th 235 235.047510(50)
236Th 236 236.04987(21)#
237Th 237 237.05389(39)#
238Th 238 238.05650(30)#

Legend

Mass Number
Relative Atomic Mass
Isotopic Composition
Standard Atomic Weight
Th: 232.0377(4)
Notes (Th)
m:

Isotopic Composition