Atomic Weights and Isotopic Compositions for Beryllium
 Isotope   Relative
Atomic Mass
 
   Isotopic
  Composition  
Standard
Atomic Weight
 
 Notes 
 
4 Be 5     5.0399(22#)   
6     6.019 7264(58)   
7     7.016 928 717(76)   
8     8.005 305 102(37)   
9     9.012 183 065(82)   1      9.012 1831(5)  
10   10.013 534 695(86)   
11   11.021 661 08(26)   
12   12.026 9221(20)   
13   13.036 135(11)   
14   14.042 89(14)   
15   15.053 42(43#)   
16   16.061 67(18)   

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