Question

Chlorine has two naturally occuring isotopes - chlorine-35 and chlorine-37. Elaborate on how the atomic mass is determined given that chlorine-35 has an abundance of 75.78% and has a mass of 34.969 amu and that chlorine-37 has an abundance of 24.22% and a mass of 36.966 amu.

Answer 1

because the gmm for chlorine is 35.5 which is the average of all of those combined, so the percentages reflect how much of each isotope is needed to make the average that specific mass per mole