Chapter 7, Problem 116QP

Interpretation Introduction

Interpretation:

The noble gases have eight valence electrons or zero valence electron is to be determined.

Concept Introduction:

The last occupied principal energy level is known as valence shell and the number of electrons present in that level is called valence electron.

Noble gases are those gases that have completely filled valence electron in the valence shell. Noble gases belong to the right side of the periodic table in the group $\text{VIII}$ . They all have electron configuration ending with $n{s}^{2}n{p}^6$ sublevel except for helium.