Chemistry: The Molecular Science (5th Edition)

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: 11c

Answer

Equal number of electrons and neutrons.

Work Step by Step

From the symbol, we see that it has a mass number of 72, and there are 36 protons. Thus: Number of neutrons = mass number - number of protons = $72-36=36$ Because it is neutral and there are 36 protons, this means that there are 36 electrons as well.
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