Atomic Weights and Isotopic Compositions for Zinc
 Isotope   Relative
Atomic Mass
 
   Isotopic
  Composition  
Standard
Atomic Weight
 
 Notes 
 
30 Zn 64   63.929 142 01(71)   0.4917(75)    65.38(2) r
66   65.926 033 81(94)   0.2773(98)
67   66.927 127 75(96)   0.0404(16)
68   67.924 844 55(98)   0.1845(63)
70   69.925 3192(21)   0.0061(10)

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