Isotopes of Lanthanum (La)

Symbol Mass Number Relative Atomic Mass Isotopic Composition
117La 117 116.95007(43)#
118La 118 117.94673(32)#
119La 119 118.94099(43)#
120La 120 119.93807(54)#
121La 121 120.93301(54)#
122La 122 121.93071(32)#
123La 123 122.92624(21)#
124La 124 123.924570(60)
125La 125 124.920816(28)
126La 126 125.91951(10)
127La 127 126.916375(28)
128La 128 127.915590(60)
129La 129 128.912693(22)
130La 130 129.912369(28)
131La 131 130.910070(30)
132La 132 131.910100(40)
133La 133 132.908220(30)
134La 134 133.908514(21)
135La 135 134.906977(11)
136La 136 135.907640(60)
137La 137 136.906494(14)
138La 138 137.907112(4) 0.00090(1)
139La 139 138.9063533(26) 0.99910(1)
140La 140 139.9094776(26)
141La 141 140.910962(5)
142La 142 141.914079(6)
143La 143 142.916063(17)
144La 144 143.919600(50)
145La 145 144.92165(10)
146La 146 145.925790(80)
147La 147 146.928240(50)
148La 148 147.932230(60)
149La 149 148.93473(34)#
150La 150 149.93877(43)#
151La 151 150.94172(43)#
152La 152 151.94625(43)#
153La 153 152.94962(64)#
154La 154 153.95450(64)#
155La 155 154.95835(86)#

Legend

Mass Number
Relative Atomic Mass
Isotopic Composition
Standard Atomic Weight
La: 138.90547(7)
Notes (La)
m:

Isotopic Composition