Answer
Isotopes are atoms of the same element with different numbers of neutrons.
Work Step by Step
The number of protons defines an element, so the number of neutrons can vary. Each isotope has a different mass number.
Introductory Chemistry (5th Edition)
by Tro, Nivaldo J.
Published by
Pearson
ISBN 10:
032191029X
ISBN 13:
978-0-32191-029-5
Chapter 4 - Atoms and Elements - Exercises - Questions - Page 120: 22
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