Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 30 - Nuclear Physics and Radioactivity - Misconceptual Questions - Page 881: 14

Answer

Choice B.

Work Step by Step

Any radon that existed several billion years ago will have completely decayed away. Radioactive elements more massive than radon (e.g., plutonium, uranium) can decay into the radon that we find today.
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