Chemistry: Principles and Practice (3rd Edition)

Published by Cengage Learning
ISBN 10: 0534420125
ISBN 13: 978-0-53442-012-3

Chapter 8 - The Periodic Table: Structure and Trends - Questions and Exercises - Questions - Page 320: 8.10

Answer

In Lithium, an electron is removed from the 2s subshell while in Sodium an electron is removed from the 3s subshell. The 3s subshell is less bound to the nucleus as compared to the 2s subshell; hence less energy is required to remove an electron from the 3s subshell.

Work Step by Step

As above
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