Chapter 10, Problem 10.31P

(a)

Interpretation Introduction

Interpretation:

Molecular shape with most electron pairs around the central atom from the given molecular shapes is to be determined.

Concept introduction:

VSEPR theory is based on the repulsions between the electrons pair in the valence shell. According to VSEPR theory, the shape of a molecule depends on the position of the electron pairs to minimize the repulsion, and maximize the stability.

According to VSEPR theory, the table for molecular geometries when the central atom has no lone pair is as follows:

$\begin{array}{cc}\text{Electron}\text{groups}& \text{Geometry}\\ \text{2}& \text{Linear}\\ \text{3}& \text{Trigonal}\text{Planar}\\ \text{4}& \text{Tetrahedral}\\ \text{5}& \text{Trigonal}\text{bipyramidal}\\ \text{6}& \text{Octahedral}\end{array}$

(b)

Interpretation Introduction

Interpretation:

Molecular shape with the most number of lone pair around central atom form the given molecular shape is to be determined.

Concept introduction:

VSEPR theory is based on the repulsions between the electrons pair in the valence shell. According to VSEPR theory, the shape of a molecule depends on the position of the electron pairs to minimize the repulsion, and maximize the stability.

According to VSEPR theory, the table for molecular geometries when the central atom has no lone pair is as follows:

$\begin{array}{cc}\text{Electron}\text{groups}& \text{Geometry}\\ \text{2}& \text{Linear}\\ \text{3}& \text{Trigonal}\text{Planar}\\ \text{4}& \text{Tetrahedral}\\ \text{5}& \text{Trigonal}\text{bipyramidal}\\ \text{6}& \text{Octahedral}\end{array}$

(c)

Interpretation Introduction

Interpretation:

Molecular shape with only bond pair of electron around central atom form the given molecular shape is to be determined.

Concept introduction:

VSEPR theory is based on the repulsions between the electrons pair in the valence shell. According to VSEPR theory, the shape of a molecule depends on the position of the electron pairs to minimize the repulsion, and maximize the stability.

According to VSEPR theory, the table for molecular geometries when the central atom has no lone pair is as follows:

$\begin{array}{cc}\text{Electron}\text{groups}& \text{Geometry}\\ \text{2}& \text{Linear}\\ \text{3}& \text{Trigonal}\text{Planar}\\ \text{4}& \text{Tetrahedral}\\ \text{5}& \text{Trigonal}\text{bipyramidal}\\ \text{6}& \text{Octahedral}\end{array}$