Structure and properties quiz

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1. 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.
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2. Explain how the atoms in a metal are bonded together.

  • The outer electrons delocalise leaving a lattice of positive ions. The delocalised electrons strongly attract the positive ions and hold them in position.
  • The outer electrons delocalise leaving a lattice of positive ions. The delocalised electrons strongly attract the negative ions and hold them in position.

3. 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.

4. Why does it take a lot of energy to melt sodium chloride?

  • It is a giant ionic structure with strong electrostatic forces which means more energy is needed to break up these forces
  • It is a giant ionic structure with weak electrostatic forces which means less energy is needed to break up these forces
  • It is a giant covalent structure with strong electrostatic forces which means more enrgy is needed to break up these forces

5. Why do ionic compounds need to be molten or in solution to conduct electricity?

  • The ions cannot move in the solid, but become free to move in the molten liquid/ solution.
  • The ions cannot move in a Liquid, but become free in to move in solid.

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