Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0132525763
ISBN 13: 978-0-13252-576-3

Chapter 5 - Electrons in Atoms - 5.2 Electron Arrangement in Atoms - 5.2 Lesson Check - Page 137: 13

Answer

The lower energy levels fill first because of the Aufbau principle. For example, 4s comes before 3d because it has less energy.

Work Step by Step

The lower energy levels fill first because of the Aufbau principle. For example, 4s comes before 3d because it has less energy.
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