Column Descriptions

                                                                         
             Relative           Isotopic      Standard                   
Isotope      Atomic Mass        Composition   Atomic Weight    Notes     
_________________________________________________________________________
36  Kr  78   77.92036494(76)    0.00355(3)    83.798(2)        g,m
        80   79.91637808(75)    0.02286(10) 
        82   81.91348273(94)    0.11593(31) 
        83   82.91412716(32)    0.11500(19) 
        84   83.9114977282(44)  0.56987(15) 
        86   85.9106106269(41)  0.17279(41) 
_________________________________________________________________________

NIST | Physical Measurement Laboratory | Physical Reference Data | Atomic Weights and Isotopic Compositions Main Page