Atomic Weights and Isotopic Compositions for Carbon
 Isotope   Relative
Atomic Mass
 
   Isotopic
  Composition  
Standard
Atomic Weight
 
 Notes 
 
6 C 8     8.037 643(20)     [12.0096, 12.0116]  
9     9.031 0372(23)   
10   10.016 853 31(42)   
11   11.011 4336(10)   
12   12.0000000(00)   0.9893(8)
13   13.003 354 835 07(23)   0.0107(8)
14   14.003 241 9884(40)   
15   15.010 599 26(86)   
16   16.014 7013(38)   
17   17.022 577(19)   
18   18.026 751(32)   
19   19.034 80(11)   
20   20.040 32(26)   
21   21.049 00(43#)   
22   22.057 53(26)   
23   23.0689(11#)   

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