A naturally occurring element consists of three isotopes. The data for the isotopes are:
Isotope 1: 46.972 u, 69.472%
Isotope 2: 48.961 u, 21.667%
Isotope 3: 49.954 u, 8.8610% What is the average atomic mass of this naturally occurring element?

Question

Quizplus · Accepted Answer

The average atomic mass is the weighted average of the masses of the isotopes, where the weights are the relative abundances of the isotopes. The average atomic mass is:(46.972 u * 0.69472) + (48.961 u * 0.21667) + (49.954 u * 0.08861) = 47.667 u

A Naturally Occurring Element Consists of Three Isotopes