Answer
The number of orbitals in shell $n=3$ is $9$.
Work Step by Step
$\textbf{Note: }$ The total number of orbitals in a shell ( $n$ ) is equal to $n^2$.
Therefore, the total number of orbitals in shell $n=3$ is $3^2=9$.
Chemistry (4th Edition)
by Burdge, Julia
Published by
McGraw-Hill Publishing Company
ISBN 10:
0078021529
ISBN 13:
978-0-07802-152-7
Chapter 6 - Section 6.6 - Quantum Numbers - Checkpoint - Page 258: 6.6.4
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