Chapter AS, Problem 12PQ

Interpretation Introduction

Interpretation:

The atomic mass of $\text{X}$ has to be determined.

Concept Introduction:

Isotopes are referred to 2 same atoms that differ only in the count of neutrons and have same count of protons and electrons.

Also, isotopes are those which have same atomic number but different atomic mass. An atom $\text{X}$ with its atomic number and atomic mass is represented as follows:

  ${}_{\text{Z}}^{\text{A}}\text{X}$

Here,

  $\text{Z}$ is atomic number of an atom.

  $\text{A}$ is atomic mass of an atom.

Count of protons or electrons comprises atomic number of an element whereas sum of protons and neutrons comprise the atomic mass of an element.