Isotopes of Protactinium (Pa)

Symbol Mass Number Relative Atomic Mass Isotopic Composition
212Pa 212 212.023200(80)
213Pa 213 213.021110(80)
214Pa 214 214.020920(80)
215Pa 215 215.019190(90)
216Pa 216 216.019110(80)
217Pa 217 217.018320(60)
218Pa 218 218.020042(26)
219Pa 219 219.019880(60)
220Pa 220 220.021880(60)
221Pa 221 221.021880(60)
222Pa 222 222.023740(80)#
223Pa 223 223.023960(80)
224Pa 224 224.025626(17)
225Pa 225 225.026130(80)
226Pa 226 226.027948(12)
227Pa 227 227.028805(8)
228Pa 228 228.031051(5)
229Pa 229 229.0320968(30)
230Pa 230 230.034541(4)
231Pa 231 231.0358840(24) 1.0000
232Pa 232 232.038592(8)
233Pa 233 233.0402473(23)
234Pa 234 234.043308(5)
235Pa 235 235.045440(50)
236Pa 236 236.04868(21)
237Pa 237 237.05115(11)
238Pa 238 238.054500(60)
239Pa 239 239.05726(21)#
240Pa 240 240.06098(32)#

Legend

Mass Number
Relative Atomic Mass
Isotopic Composition
Standard Atomic Weight
Pa: 231.03588(2)

Isotopic Composition