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 90b: 21

Answer

43 protons 43 electrons 56 neutrons

Work Step by Step

All Te atoms have 43 protons, which can be found on the periodic table. Since it is a neutral atom, we know that there must be 43 electrons as well. The mass number, 99, minus the number of protons gives the number of neutrons. Thus: 99-43=56
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