Chapter 9 - Section 9.9 - Exceptions to the Octet Rule: Odd-Electron Species, Incomplete Octets, and Expanded Octets - Conceptual Connection: 9.6

The correct answer is $(d)$ $(NO_2)$

Work Step by Step

In $NO_2$, the N has 5 valence electrons and O has 6 valence electrons. The sum of valence electrons is an odd number. So, it is expected to be a free radical.

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