Chapter 2, Problem 76QP

Interpretation Introduction

Interpretation:

The number of protons and electrons in the given ions is to be calculated.

Concept introduction:

For a neutral atom, the number of protons or electrons is equivalent to its atomic number. Ions that have a less number of valence electrons acquire a positive charge and are termed as a cation. Consequently, the number of protons ismore than the number of electrons for a cation. The other way around is true for anions.

For an ion, the number of protons remains the same as the atomic number but the number of electronsis equal to the difference between thenumber of protons and the charge of the ion.

The number of electrons can be calculated by:

$\text{Number of electrons}= \text{Number of protons }-\text{Charge of ion}$