Conceptual Physics (12th Edition)

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

Chapter 34 - Think and Explain: 63

Answer

Ruthenium.

Work Step by Step

Uranium has atomic number 92. If it splits evenly, it turns into 2 atoms of palladium, atomic number 46. If palladium emits an alpha particle (2 protons and 2 neutrons), its atomic number drops by 2. This leaves ruthenium, with atomic number 44.
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