Solution: Suppose that a fictitious element, X, has two isotopes: 50X (59.015 amu) and 82X (62.011 amu). The lighter isotope has an abundance of 73.7%. Calculate the atomic mass of the element X.

Problem

Suppose that a fictitious element, X, has two isotopes: ^{50}X (59.015 amu) and ^{82}X (62.011 amu). The lighter isotope has an abundance of 73.7%.