what is the black material inside the pencil
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the black material inside the pencil is graphite and it has the property that it leaves a black mark like lead on rubbing on paper. It is also called black lead or plumbago because it leaves black mark on paper.
graphite has uniplanar layers consisting of 6 carbon atoms hexagonal advanced benzene rings and the the different layers are held together closely by weak Van Der Waals forces.
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