Chapter 16.2, Problem 8R

To determine

To Explain: The atomic mass of an element that is weighted average mass. 

Explanation of Solution

Introduction:

The average atomic mass is defined as “it is the sum of masses of its isotopes that is multiplied by the natural abundance. 

Explanation: 

The mass of element which is shown in periodic table is actually average atomic mass of the element which is taken from known isotopes of an element. The weighted average is calculated using the relative abundance of the isotope.

Conclusion: 

The weighted average also helps with the isotope which would work in a chemical reaction.