Answer
The lightest atoms have been around since the beginning of the universe, and the heavier atoms were manufactured by fusion within stars, or inside supernovas.
Work Step by Step
This is discussed on pages 211 and 214.
Conceptual Physics (12th Edition)
by Hewitt, Paul G.
Published by
Addison-Wesley
ISBN 10:
0321909100
ISBN 13:
978-0-32190-910-7
Chapter 11 - Think and Discuss - Page 225: 62
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