Naphthalene () is the simplest polycyclic aromatic hydrocarbon, famously used in mothballs. What is — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

Naphthalene consists of two fused benzene rings. It contains five formal carbon-carbon double bonds in its most stable resonance structures. Since each double bond contributes two $\pi$ -electrons, the entire conjugated system contains exactly $5 \times 2 = 10$ $\pi$ -electrons.