Chapter 2.1, Problem 2.1Q

(a)

Interpretation Introduction

Interpretation:

The number of protons, neutrons, and electrons in bromine-79 has to be calculated.

Concept Introduction:

In the center of the atom, there is a small, dense, positively charged region called as nucleus.  The nucleus is composed of positively charged protons and uncharged neutrons.   Surrounding the nucleus is a diffuse region of negative charge populated by electrons.

    $\begin{array}{l}\text{X}\\ \\ \text{A}\text{is}\text{mass}\text{number,Z}\text{is}\text{atomic}\text{number,}\text{X}\text{is}\text{element}\text{symbol}\\ \\ \text{Mass number = number of protons + number of neutrons}\\ \\ \text{Number of neutrons = mass number - atomic number}\end{array}$

(b)

Interpretation Introduction

Interpretation:

The number of protons, neutrons, and electrons in bromine-81 has to be calculated.

Concept Introduction:

Refer to part a.

(c)

Interpretation Introduction

Interpretation:

The number of protons, neutrons, and electrons in iron-56 has to be calculated.

Concept Introduction:

Refer to part a.