Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 7 - Sections 7.1-7.6 - Exercises - Problems by Topic: 65



Work Step by Step

Since a photon is emitted, the electron must transition from a higher principal energy level to a lower energy prinicipal level. Since the only energy principal level below n=2 is n=1, this must be the energy level that the electron must transition when the photon is emitted.
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