Question

What is the average atomic mass of an element with isotopes a b and c?

Answer 1

amm=(%of a × mass of a + %of b ×mass of b +%of c × mass of c)/100

Answer 2

Average Atomic Mass of the Isotope = [ Percentage of a in mass spectrum x corresponding atomic mass of a + Percentage of b in mass spectrum x corresponding atomic mass of b + Percentage of c in mass spectrum x corresponding atomic mass of c ]