Isotopes of Cesium (Cs)

Symbol Mass Number Relative Atomic Mass Isotopic Composition
112Cs 112 111.95030(33)#
113Cs 113 112.94449(11)
114Cs 114 113.94145(33)#
115Cs 115 114.93591(32)#
116Cs 116 115.93337(11)#
117Cs 117 116.928670(70)
118Cs 118 117.926559(14)
119Cs 119 118.922377(15)
120Cs 120 119.920677(11)
121Cs 121 120.917229(15)
122Cs 122 121.916110(30)
123Cs 123 122.912996(13)
124Cs 124 123.912258(9)
125Cs 125 124.909728(8)
126Cs 126 125.909452(13)
127Cs 127 126.907418(6)
128Cs 128 127.907749(6)
129Cs 129 128.906064(5)
130Cs 130 129.906709(9)
131Cs 131 130.905464(5)
132Cs 132 131.9064343(20)
133Cs 133 132.905451933(24) 1.0000
134Cs 134 133.906718475(28)
135Cs 135 134.9059770(11)
136Cs 136 135.9073116(20)
137Cs 137 136.9070895(5)
138Cs 138 137.911017(10)
139Cs 139 138.913364(3)
140Cs 140 139.917282(9)
141Cs 141 140.920046(11)
142Cs 142 141.924299(11)
143Cs 143 142.927352(25)
144Cs 144 143.932077(28)
145Cs 145 144.935526(12)
146Cs 146 145.940290(80)
147Cs 147 146.944160(60)
148Cs 148 147.94922(62)
149Cs 149 148.95293(21)#
150Cs 150 149.95817(32)#
151Cs 151 150.96219(54)#

Legend

Mass Number
Relative Atomic Mass
Isotopic Composition
Standard Atomic Weight
Cs: 132.90545196(6)

Isotopic Composition