What else is in the naturally occuring zinc, the abundance of the two isotopes combined is only 76 percent (about) by adding 48.9+27.8 . Something else has to be there.
Dont divide by two, you will divide by 1.0 (the sum of the abundances, hopefully 100 precent or 1.0). But something is missing here.
there are two naturally occurring isotopes of the element zinc. the relative abundance and mass of each are as follow
64
30zn=48.89% 63.929 amu
66
30zn=27.81% 65.926
is it 0.4889(63.929)+027.81(65.926) divide by 2?
1 answer