Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 7 - Atomic Structure and Periodicity - Exercises: 108

Answer

a. $Rb < Na < Be$ b. $Sr < Se < Ne$ c. $Fe < P < O$

Work Step by Step

a. The first ionization energy generally decreases with a higher principal quantum number and less number of valence electrons. Therefore, the order is $Rb < Na < Be$. b. The first ionization energy generally decreases with a higher principal quantum number and less number of valence electrons. Therefore, the order is $Sr < Se < Ne$. c. The first ionization energy generally decreases with a higher principal quantum number and less number of valence electrons. Therefore, the order is $Fe < P < O$.
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