Chemistry: Molecular Approach (4th Edition)

Published by Pearson
ISBN 10: 0134112830
ISBN 13: 978-0-13411-283-1

Chapter 9 - Section 9.9 - Exceptions to the Octet Rule: Odd-Electron Species, Incomplete Octets, and Expanded Octets - Conceptual Connection - Page 411: 9.7


The correct answer is (b) $H_3PO_4$

Work Step by Step

Among the 4 given options, phosphorus ($P$) is the only third-period element. So, only $H_3PO_4$ can have an expanded octet. Second-period elements like carbon and nitrogen never form compounds with expanded octets.
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