Chapter 4, Problem 112E

Interpretation Introduction

Interpretation:

The natural abundance of two isotopes of lithium is to be determined.

Concept Introduction:

Atoms of the same element which have a same atomic number but a different mass number are called isotopes.

With the help of atomic mass, the relative abundance of each isotope is:

$\begin{array}{c}\text{Atomic mass}=\left({\text{fraction of }}^6\text{Li}\times {\text{mass of }}^6\text{Li}\right)+\\ \left({\text{fraction of }}^7\text{Li}\times {\text{mass of }}^7\text{Li}\right)\end{array}$