Structure and properties quiz

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1. Explain why diamonds are very hard.

  • Every carbon atom is covalently bonded to 4 other carbon atoms in its structure.
  • Every carbon atom is ionic bonded to 4 other carbon atoms in its structure.
  • Every carbon atom is covalently bonded to 3 other carbon atoms in its structure.
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2. Polymers made from different monomers have different properties. Explain why.

  • Different monomers change the structure of the polymer chains because polymer chains are different shapes and sizes
  • different monomers change the structure of the polymer chains because polymer chains all are the same shape and size.
  • The same monomers change the structure different monomers change the structure of the polymer chains.

3. Why can graphite conduct electricity?

  • The delocalised electrons in graphite carries the charge.
  • Because it has weak intermolecular forces.
  • Because its silver.

4. Silver nanoparticles are used in socks to prevent bad smells. Suggest why the manufacturers used nanoparticles instead of regular silver particles.

  • They are more effective and cheaper.
  • They are better looking and more effective.
  • They keep the socks intact for longer.

5. Silver nanoparticles are used in socks to prevent bad smells. How are silver nanoparticles different to regular silver particles?

  • They are very small and have a smaller surface area.
  • They are very small and have a greater surface area.
  • They are very large and have a greater surface area.

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