Isotopes of Praseodymium (Pr)

Symbol Mass Number Relative Atomic Mass Isotopic Composition
121Pr 121 120.95536(75)#
122Pr 122 121.95181(54)#
123Pr 123 122.94596(64)#
124Pr 124 123.94296(64)#
125Pr 125 124.93783(43)#
126Pr 126 125.93531(21)#
127Pr 127 126.93083(21)#
128Pr 128 127.928790(30)
129Pr 129 128.925100(30)
130Pr 130 129.923590(70)
131Pr 131 130.920260(60)
132Pr 132 131.919260(60)
133Pr 133 132.916331(13)
134Pr 134 133.915710(40)
135Pr 135 134.913112(13)
136Pr 136 135.912692(13)
137Pr 137 136.910705(13)
138Pr 138 137.910755(15)
139Pr 139 138.908938(8)
140Pr 140 139.909076(7)
141Pr 141 140.9076528(26) 1.0000
142Pr 142 141.9100448(26)
143Pr 143 142.9108169(28)
144Pr 144 143.913305(4)
145Pr 145 144.914512(8)
146Pr 146 145.917640(70)
147Pr 147 146.918996(25)
148Pr 148 147.922135(28)
149Pr 149 148.923720(90)
150Pr 150 149.926673(28)
151Pr 151 150.928319(25)
152Pr 152 151.93150(13)
153Pr 153 152.93384(11)
154Pr 154 153.93752(16)
155Pr 155 154.94012(32)#
156Pr 156 155.94427(43)#
157Pr 157 156.94743(43)#
158Pr 158 157.95198(64)#
159Pr 159 158.95550(75)#

Legend

Mass Number
Relative Atomic Mass
Isotopic Composition
Standard Atomic Weight
Pr: 140.90766(2)

Isotopic Composition