Chapter 12, Problem 2E

Interpretation Introduction

Interpretation:

The number of valence electrons for hydrogen and chlorine atom is to be stated.

Concept introduction:

The valence electrons are defined as the electrons that are found in the outermost subshell. In a chemical bond, the valence electrons are responsible for holding the atoms together.

According to the octet rule, the atom must contain $8$ electrons in its valence shell.