Chapter 9, Problem 9.57QP

Interpretation Introduction

Interpretation:

Fluorine which has seven valence electrons in outermost shell could not form compounds such as ${\text{FH}}_{\text{7}}$ and ${\text{FCl}}_{\text{7}}$ should be explained.

Concept Introduction: The “octet rule’’ says that atoms will achieve stability by lose, gain or share electrons by bonding with other atoms. So, that they will have eight electron in their outermost shell and get noble gas configuration ${\text{ns}}^{\text{2}}{\text{np}}^{\text{6}}$ for stability.

Exception from octet rule;

There are few reasons to exception from octet rule

1. 1) Some compounds which have odd number of electrons
2. 2) Some compounds which have more than eight electrons namely expanded octet
3. 3) Some compounds which have less than eight electrons

To identify: The reason for molecules ${\text{FH}}_{\text{7}}$ and ${\text{FCl}}_{\text{7}}$ cannot to be prepared.