Column Descriptions

                                                                         
             Relative           Isotopic      Standard                   
Isotope      Atomic Mass        Composition   Atomic Weight    Notes     
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82  Pb  204  203.9730440(13)    0.014(1)      207.2(1)         g,r
        206  205.9744657(13)    0.241(1)    
        207  206.9758973(13)    0.221(1)    
        208  207.9766525(13)    0.524(1)    
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