Chapter 2.6, Problem 2.12Q

(a)

Interpretation Introduction

Interpretation:

The number of protons and electrons in ${\text{Ni}}^{\text{2+}}$ has to be given.

Concept Introduction:

• Protons are located in atomic nucleus of an atom.  Protons are positively charged one.
• Electrons are revolving around nucleus.  They are negatively charged one.  The number of protons and electrons are same in a neutral atom.

(b)

Interpretation Introduction

Interpretation:

The number of protons and electrons in ${\text{Br}}^{\text{-}}$ has to be given.

Concept Introduction:

Refer to part a.

(c)

Interpretation Introduction

Interpretation:

The number of protons and electrons in ${\text{N}}^{\text{3-}}$ has to be given.

Concept Introduction:

Refer to part a.