Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
In C, the answer states that electrons must come in pairs. And so C does not show resonance forms.
But here I read that if there is an unpaired electron, it is a free radical. Why can't free radicals be part of the resonance form?
Required, but never shown