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 - Exercise 5.15 - Highest Energy Electrons in Ground-State Atoms - Page 219: a


The highest occupied energy level in Chlorine is n = 3 with a configuration of $3s^{2}3p^{5}$. The highest occupied energy level in Selenium is n = 4 with a configuration of $4s^{2}4p^{4}$

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