Conceptual Physics (12th Edition)

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

Chapter 33 - Reading Check Questions (Comprehension): 23

Answer

The transmutation of thorium by beta emission produces an element whose atomic number is 1 higher. The new atomic number is 91.

Work Step by Step

This is discussed on page 629, and shown in Figure 33.22.
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