Benzene (C₆H₆) has a cyclic structure with six carbon atoms arranged in a hexagon. Each carbon atom is bonded to one hydrogen atom. In the resonance structure representation, there are alternating single and double bonds between the carbon atoms. Each single bond (C-C and C-H) consists of one sigma (σ) bond. Each double bond (C=C) consists of one sigma (σ) bond and one pi (π) bond. In benzene, there are 6 C-H single bonds, 3 C-C single bonds, and 3 C-C double bonds (in one resonance form). Total sigma bonds = 6 (C-H) + 3 (C-C single) + 3 (C-C in double) = 12. Total pi bonds = 3 (from the three double bonds). Thus, benzene has 12 sigma bonds and 3 pi bonds.