Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 2 - The Nature of Molecules and the Properties of Water - Review Questions - Understand: 4

Answer

A.

Work Step by Step

The weights of two isotopes of the same element differ due to the number of neutrons since changing the number of protons changes the identity of the element and electrons are small enough to have a negligible effect on atomic weight. Thus, A. is correct, not B. or C. Since B. and C. are eliminated, so is D.
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