Chapter 9, Problem 13STP

(a)

Interpretation Introduction

Interpretation: The contents given should be classified as elements only, compounds only, or elements and compounds.

Concept Introduction: An element is a substance that cannot be broken down into simpler formats. Compounds are substances made up of two or more different chemical elements combines in a fixed ratio.

Answer to Problem 13STP

The contents in this group can be classified as elements and compounds.

Explanation of Solution

It contains two different types of single balls representing elements and three combined balls denoting compounds.

(b)

Interpretation Introduction

Interpretation: The contents given should be classified as elements only, compounds only, or elements and compounds.

Concept Introduction: An element is a substance that cannot be broken down into simpler formats. Compounds are substances made up of two or more different chemical elements combines in a fixed ratio.

Answer to Problem 13STP

This group of contents can be classified as elements only.

Explanation of Solution

It contains only single balls indicating pure elements, hence it can be classified as elements only.

(c)

Interpretation Introduction

Interpretation: The contents given should be classified as elements only, compounds only, or elements and compounds.

Concept Introduction: An element is a substance that cannot be broken down into simpler formats. Compounds are substances made up of two or more different chemical elements combines in a fixed ratio.

Answer to Problem 13STP

It is an element-only group containing only one type of atom.

Explanation of Solution

The single balls represent pure elements, hence it contains elements only.

(d)

Interpretation Introduction

Interpretation: The contents given should be classified as elements only, compounds only, or elements and compounds.

Concept Introduction: An element is a substance that cannot be broken down into simpler formats. Compounds are substances made up of two or more different chemical elements combines in a fixed ratio.

Answer to Problem 13STP

It is a compound-only group.

Explanation of Solution

It contains combined balls representing triatomic compounds. So it is a compounds-only group.