Column Descriptions

                                                                         
             Relative           Isotopic      Standard                   
Isotope      Atomic Mass        Composition   Atomic Weight    Notes     
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40  Zr  90   89.9046977(20)     0.5145(40)    91.224(2)        g
        91   90.9056396(20)     0.1122(5)   
        92   91.9050347(20)     0.1715(8)   
        94   93.9063108(20)     0.1738(28)  
        96   95.9082714(21)     0.0280(9)   
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