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Discuss the melting points in the table below in terms of the bonding and/or intermolecular forces present in each substance. Substance Melting point / K Silicon dioxide (quartz) 1986 Poly(propene) 433
Four allotropes of carbon, labelled W, X, Y and Z, are described in the table. Allotrope Description W a single flat sheet of hexagonal rings, one atom thick, in which each carbon atom is bonded to three others X a closed cage of 60 atoms made of pentagonal…
Which statements about the allotropes of carbon are correct? I. Graphite conducts electricity because each carbon atom contributes one electron to a delocalized system. II. Diamond conducts electricity because it has a covalent network structure. III.…
A solid has a very high melting point, does not conduct electricity when solid or when molten, and is insoluble in water and in non-polar solvents. Which type of structure does the solid have? A. Ionic lattice B. Metallic lattice C. Covalent molecular D.…
Which substance is a good conductor of electricity in the solid state? A. Graphene B. Diamond C. Silicon dioxide D. Silicon