Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 27 - Early Quantum Theory and Models of the Atom - Questions - Page 797: 20


The atoms in hydrogen gas at room temperature are almost all in the ground state of n=1.

Work Step by Step

When hydrogen gas is at room temperature, nearly all the H atoms are in the n=1 ground state. When a wide spectrum of light passes through the gas, photons are absorbed that are found in the Lyman series because these transitions involve electrons coming from or dropping to the n=1 ground state. Other series, containing photons that correspond to transitions between higher n states, are not absorbed because almost no atoms start in higher energy states.
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.