Isotopes of Samarium (Sm)

Symbol Mass Number Relative Atomic Mass Isotopic Composition
128Sm 128 127.95808(54)#
129Sm 129 128.95464(54)#
130Sm 130 129.94892(43)#
131Sm 131 130.94611(32)#
132Sm 132 131.94069(32)#
133Sm 133 132.93867(21)#
134Sm 134 133.93397(21)#
135Sm 135 134.93252(17)
136Sm 136 135.928276(13)
137Sm 137 136.926970(50)
138Sm 138 137.923244(13)
139Sm 139 138.922297(12)
140Sm 140 139.918995(13)
141Sm 141 140.918476(9)
142Sm 142 141.915198(6)
143Sm 143 142.914628(4)
144Sm 144 143.911999(3) 0.0307(7)
145Sm 145 144.913410(3)
146Sm 146 145.913041(4)
147Sm 147 146.9148979(26) 0.1499(18)
148Sm 148 147.9148227(26) 0.1124(10)
149Sm 149 148.9171847(26) 0.1382(7)
150Sm 150 149.9172755(26) 0.0738(1)
151Sm 151 150.9199324(26)
152Sm 152 151.9197324(27) 0.2675(16)
153Sm 153 152.9220974(27)
154Sm 154 153.9222093(27) 0.2275(29)
155Sm 155 154.9246402(28)
156Sm 156 155.925528(10)
157Sm 157 156.928360(50)
158Sm 158 157.929990(80)
159Sm 159 158.93321(11)
160Sm 160 159.93514(21)#
161Sm 161 160.93883(32)#
162Sm 162 161.94122(54)#
163Sm 163 162.94536(75)#
164Sm 164 163.94828(86)#
165Sm 165 164.95298(97)#

Legend

Mass Number
Relative Atomic Mass
Isotopic Composition
Standard Atomic Weight
Sm: 150.36(2)
Notes (Sm)
m:

Isotopic Composition