Answer
$1s\lt2s=2p\lt3s=3p=3d\lt4s$
Work Step by Step
Subshells in a higher shell have more energy whilst those in the same shell have the same energy.
$1s\lt2s=2p\lt3s=3p=3d\lt4s$
Chemistry and Chemical Reactivity (9th Edition)
by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.
Published by
Cengage Learning
ISBN 10:
1133949649
ISBN 13:
978-1-13394-964-0
Chapter 6 The Structure of Atoms - Study Questions - Page 247c: 61
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