Column Descriptions

                                                                         
             Relative           Isotopic      Standard                   
Isotope      Atomic Mass        Composition   Atomic Weight    Notes     
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58  Ce  136  135.90712921(41)   0.00185(2)    140.116(1)       g
        138  137.905991(11)     0.00251(2)  
        140  139.9054431(23)    0.88450(51) 
        142  141.9092504(29)    0.11114(51) 
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