Significance of S 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.

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Chapter 2.5, Problem 1RC

a)

Interpretation Introduction

Interpretation:

Significance of S8 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.

A= Number of protons(P) + Number of neutrons(n)

Consider an element X with atomic number and mass number,

ZAX

Where,

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

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