Chemistry: Molecular Approach (4th Edition)

Published by Pearson
ISBN 10: 0134112830
ISBN 13: 978-0-13411-283-1

Chapter 1 - Exercises: 37

Answer

a. mixture, homogeneous; b. pure substance, compound; c. pure substance, element; d. mixture, heterogeneous

Work Step by Step

A pure substance is composed of only one single type of atom or molecule. An element can't be broken down into smaller, simpler units. A compound is composed of two or more elements. A mixture is composed of two or more different types of atoms or molecules that can be combined in variable proportions. In a homogenous mixture, the atoms or molecules are mixed uniformly. In a heterogeneous mixture, the atoms or molecules are mixed randomly.
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