Conceptual Physics (12th Edition)

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

Part 7 - Multiple-Choice Practice Exam - Page 656: 15


When an element ejects an alpha particle, the atomic number goes down by 2.

Work Step by Step

An alpha particle has two protons and two neutrons, and thus, takes away 2 positive charges. This is discussed on page 629.
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