localised on every third C-atom. present in anti-bonding orbital. localised on each C-atom. SPREAD out between the STRUCTURE.
Solution :In graphite, each CARBON is `sp^2` -hybridized and the single occupied unhybridized p-orbitals of C-atoms OVERLAP side wise to GIVE `pi`-electron cloud which is delocalized and thus the electrons are spread out between the structure.