Chapter 2.3, Problem 2.16P

(a)

Interpretation Introduction

Interpretation:

The species with highest mass number among the given figure has to be given.

The given figure is,

Figure 1

Concept Introduction:

Mass number (A):

Mass number of an element is defined as the total number of protons and neutrons in an atom.

  $\text{A=Number}\text{of}\text{protons}\text{+}\text{Number}\text{of}\text{neutrons}$

(b)

Interpretation Introduction

Interpretation:

The number of electrons in each species given in the representation has to be given.

The given figure is,

Figure 1

Concept Introduction:

Electrons:

Electrons have an electric charge of $\text{-1}$, which is equal but opposite to the charge of a proton, which have an electric charge of $\text{+1}\text{.}$  All atoms have the same number of electrons as protons, so the positive and negative charges cancel out making atoms electrically neutral.

(c)

Interpretation Introduction

Interpretation:

The isotopic symbol of each species in the given figure has to be given.

The given figure is,

Figure 1