Atomic Weights and Isotopic Compositions for Xenon
 Isotope   Relative
Atomic Mass
 
   Isotopic
  Composition  
Standard
Atomic Weight
 
 Notes 
 
54 Xe 124 123.905 8920(19)   0.000 952(3)  131.293(6) g,m
126 125.904 2983(38)   0.000 890(2)
128 127.903 5310(11)   0.019 102(8)
129 128.904 780 8611(60)   0.264 006(82)
130 129.903 509 349(10)   0.040 710(13)
131 130.905 084 06(24)   0.212 324(30)
132 131.904 155 0856(56)   0.269 086(33)
134 133.905 394 66(90)   0.104 357(21)
136 135.907 214 484(11)   0.088 573(44)

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