Answer
B
Work Step by Step
The quantum numbers $n, \ell, m_\ell$ define the orbital and from the exclusion principle, $m_s$ must have the opposite sign for the two electrons in the same orbital.
Chemistry and Chemical Reactivity (9th Edition)
by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.
Published by
Cengage Learning
ISBN 10:
1133949649
ISBN 13:
978-1-13394-964-0
Chapter 7 The Structure of Atoms and Periodic Trends - 7-1 The Pauli Exclusion Principle - Review & Check for Section 7-1 - Page 250: 2
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