Chapter 9, Problem 9.29QP

Interpretation Introduction

Interpretation:

The number of lone pairs on the underlined atoms in the following compounds have to be determined.

$H\underset{\_}{Br},H_2\underset{\_}{S},\underset{\_}{C}{H}_4$

Concept Introduction:

Lone pairs

Lone pairs refer to the electrons of an atom that are not involved in bond formation with another atoms in formation of molecule.  These electrons exist in paired spin state in the orbitals of the atom and they are “alone” as they are not involved in bond formation.  Thus these electrons are termed as “lone pair electrons” or simply “lone pairs.”