Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 33 - Think and Discuss: 87

Answer

See below.

Work Step by Step

The chart in Figure 33.22 shows that there are elements with atomic numbers smaller than that of uranium that are "daughters" of uranium-238. U-238 has a very long half-life of 4.5 billion years. The lighter elements are continuously being made from the radioactive decay of uranium and other long-lived radioactive elements.
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