Chapter 8, Problem 8.6P

(a)

Interpretation Introduction

Interpretation:

The structure of ${\text{NH}}_{\text{2}}{}^{\text{-}}$ has to be predicted as linear or bent.

Concept Introduction:

The steric number is a sum of the number of ligands and lone pairs surrounding the central atom.

  $\text{steric}\text{number}\text{=(m+n)}$

where m is the number of ligands and n is the number of lone pairs

(b)

Interpretation Introduction

Interpretation:

The structure of ${\text{PF}}_{\text{2}}{}^{\text{+}}$ has to be predicted as linear or bent.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

The structure of ${\text{IF}}_{\text{2}}{}^{\text{+}}$ has to be predicted as linear or bent.

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

The structure of ${\text{Br}}_{\text{3}}{}^{\text{-}}$ has to be predicted as linear or bent.

Concept Introduction:

Refer to part (a).