Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0321908449
ISBN 13: 978-0-32190-844-5

Chapter 5 - Section 5.1 - Natural Radioactivity - Questions and Problems - Page 138: 5.2c

Answer

This is a neutron.

Work Step by Step

This reduces the mass number by one, but has no effect on the atomic number.
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