Isotopes of Erbium (Er)

Symbol Mass Number Relative Atomic Mass Isotopic Composition
143Er 143 142.96634(64)#
144Er 144 143.96038(43)#
145Er 145 144.95739(43)#
146Er 146 145.95200(32)#
147Er 147 146.94949(32)#
148Er 148 147.94455(21)#
149Er 149 148.942310(30)
150Er 150 149.937914(18)
151Er 151 150.937449(18)
152Er 152 151.935050(11)
153Er 153 152.935063(9)
154Er 154 153.932783(6)
155Er 155 154.933209(7)
156Er 156 155.931065(26)
157Er 157 156.931920(30)
158Er 158 157.929893(27)
159Er 159 158.930684(5)
160Er 160 159.929083(26)
161Er 161 160.929995(10)
162Er 162 161.928778(4) 0.00139(5)
163Er 163 162.930033(6)
164Er 164 163.929200(3) 0.01601(3)
165Er 165 164.930726(3)
166Er 166 165.9302931(27) 0.33503(36)
167Er 167 166.9320482(27) 0.22869(9)
168Er 168 167.9323702(27) 0.26978(18)
169Er 169 168.9345904(27)
170Er 170 169.9354643(30) 0.14910(36)
171Er 171 170.9380298(30)
172Er 172 171.939356(5)
173Er 173 172.94240(21)#
174Er 174 173.94423(32)#
175Er 175 174.94777(43)#
176Er 176 175.95008(43)#
177Er 177 176.95405(54)#

Legend

Mass Number
Relative Atomic Mass
Isotopic Composition
Standard Atomic Weight
Er: 167.259(3)
Notes (Er)
m:

Isotopic Composition