Chapter 6, Problem 7A

Summary Introduction

Introduction:

Elements are pure substance that cannot be broken down into simpler substances by chemical or physical means. Each element has unique physical and chemical properties. Elements are made up of only one type of atom.

Answer to Problem 7A

Correct answer :

The correct answer is option C. an element.

Explanation of Solution

Explanation/justification for the correct answer :

Option C. an element. An element cannot be broken down into simpler substances by any physical or chemical methods such as boiling, melting, freezing or chemical reactions with other components. So, the correct answer is option C

Explanation for incorrect answer :

Option A. a compound. A compound is a substance formed when two or more chemical elements are chemically bonded together. It might be broken down into simpler compounds. So, this is an incorrect answer.

Option B. a mixture. Mixtures are physically combined structures that can be separated into their original components. So, this is an incorrect answer.

Option D. a neutron. Neutrons can be broken down further into quarks. So, this is an incorrect answer.