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: 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.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.