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  Diamond is the hardest substance known & can be synthesized by
               subjecting pure carbon to very high pressure and temperature.



























                     GRAPHITE-
                             In graphite, each carbon atom is bonded to three other carbon
               atoms in the same plane giving a hexagonal array.
                      Graphite structure is formed by the hexagonal arrays being placed in
               layers one above the other. So,

                      Graphite is smooth and slippery
                      Graphite is a very good conductor of electricity unlike other non-metals.
































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