Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 2 - Atoms, Molecules, and Ions - Exercises: 2.25b

Answer

Atomic Number

Work Step by Step

The atomic number, or the number of protons, defines the identity of the element. This is because the atoms of each element have a characteristic number of protons. Changing neutrons is what makes isotopes.
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