Chemistry: The Molecular Science (5th Edition)

by Moore, John W.; Stanitski, Conrad L.

Published by Cengage Learning

ISBN 10: 1285199049

ISBN 13: 978-1-28519-904-7

Chapter 2 - Chemical Compounds - Questions for Review and Thought - Topical Questions - Page 90a: 18

Answer

The number of neutrons is different by 3.

Work Step by Step

Difference in mass number of an element = difference in the number of neutrons = 238-235 = 3

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