1.37 explain the high melting and boiling points of substances with giant covalent structures in terms of the breaking of many strong covalent bonds

1.37 •giant covalent structures are similar to ionic structures but they have no charged ions

       

        •all the atoms are bonded to each other by strong covalent bonds

        •there are lots of these bonds, so it takes a lot of energy to break them, which means giant covalent structures have very high melting and boiling points

         •they don’t conduct electricity - not even when molten (except for graphite) 

         •they’re usually insoluble in water

         •examples of giant covalent structures include diamond and graphite, which are both only made from carbon atoms