This video covers the following specification points:
1.47 Explain why substances with a simple molecular structure are gases or liquids, or solids with low melting and boiling points
1.48 Explain why the melting and boiling points of substances with simple molecular structures increase, in general, with increasing relative molecular mass
1.49 Explain why substances with giant covalent structures are solids with high melting and boiling points
1.50 Explain how the structures of diamond, graphite and C60 fullerene influence their physical properties, including electrical conductivity and hardness
1.51. Know that covalent compounds do not usually conduct electricity
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