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 - Page 75: 2.21a

Answer

Protons, neutrons, and electrons.

Work Step by Step

Atoms are all made of some combination of protons, neutrons, and electrons.
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