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In benzene, the electrons in the pi system are delocalized, meaning they are not confined to specific bonds between carbon atoms. This delocalization creates a ring of electron density above and below the plane of the benzene ring. The stability of this delocalized system, known as aromaticity, is the key to understanding why benzene is unusually stable compared to other cyclic systems. The delocalization of electrons spreads the electron density evenly across all six carbon atoms, making all carbon-carbon bonds equivalent. This equal distribution of electron density leads to the lack of specific double and single bonds, explaining why nodes go through the carbons in benzene.