Chapter 4, Problem 24E

Interpretation Introduction

Interpretation: The mass number of an isotope is to be explained.

Concept Introduction:

Mass number of an element is equal to the total number of neutrons and protons present in their atom.

It is denoted by the symbol $A$. Mathematically, it is represented as follows:

$A=p+n$

Here, $A$ is the mass number, $p$ is the number of protons, and $n$ is the number of neutrons.