Chapter 2.5, Problem 1RC

a)

Interpretation Introduction

Interpretation:

Significance of ${\text{S}}_{\text{8}}$ and how it differ from 8S has to be explained.

Concept Introduction:

Molecule is a combination of more than one atom in a fixed arrangement held together by chemical bond.  Other hand, a molecule has atoms of same element of two or more elements held in a definite ratio according to law of definite proportions.

b)

Interpretation Introduction

Interpretation:

The number of protons and electrons for the given ions has to be determined.

Concept Introduction:

Mass number (A): Mass number of an element is sum of protons and neutrons of the atom.

$\text{A= Number of protons}\left(\text{P}\right)\text{ + Number of neutrons}\left(\text{n}\right)$

Consider an element X with atomic number and mass number,

${}_Z^A\text{X}$

Where,

A is mass number and Z is atomic number (number of proton or electron)