Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning
ISBN 10: 1285199049
ISBN 13: 978-1-28519-904-7

Chapter 5 - Electron Configurations and the Periodic Table - Questions for Review and Thought - Applying Concepts - Page 240f: 128c


5 and 13

Work Step by Step

To find the answer, note that the peaks both shift right by 1 for each ionization energy. Since the third ionization energy has peaks at 4 and 12, the fourth ionization energy will have peaks at 5 and 13.
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