Answer
The number of protons in an atom's nucleus
Work Step by Step
An element is defined by the number of protons in its nucleus. Each element has a distinct number of protons in its nucleus.
Chemistry: A Molecular Approach (3rd Edition)
by Tro, Nivaldo J.
Published by
Prentice Hall
ISBN 10:
0321809246
ISBN 13:
978-0-32180-924-7
Chapter 2 - Sections 2.1-2.9 - Exercises - Review Questions - Page 79: 14
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