Answer
$l=4$.
Work Step by Step
Relate the magnitude of the orbital angular momentum L to the quantum number $l$ by Eq. (41.22):
$L=\sqrt{l(l+1)}\hbar$.
The value of L is given, so we solve for $l(l+1)=20$. Since $l$ is an integer, $l=4$.
University Physics with Modern Physics (14th Edition)
by Young, Hugh D.; Freedman, Roger A.
Published by
Pearson
ISBN 10:
0321973615
ISBN 13:
978-0-32197-361-0
Chapter 41 - Quantum Mechanics II: Atomic Structure - Problems - Exercises - Page 1402: 41.9
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