How bonding and structure are related to the properties of substances: Practice Questions

• a.

  It is a metallic structure with weak metallic bonds between positive ions and delocalised electrons.

• b.

  It is a giant covalent structure with weak covalent bonds between atoms.

• c.

  It is a small molecular structure with weak intermolecular forces that require little energy to overcome.

• d.

  It is a giant ionic lattice with weak electrostatic attractions between oppositely charged ions.

• a.

  The delocalised electrons act as a lubricant between the nuclei.

• b.

  The ions are held in a giant lattice by strong electrostatic forces.

• c.

  The atoms are arranged in layers which can slide over each other.

• d.

  The molecules are held together by weak intermolecular forces.

• a.

  It is very soft because the layers are held together by weak intermolecular forces.

• b.

  It is an excellent conductor of electricity because it contains delocalised electrons.

• c.

  It has a low melting point because it consists of small hollow molecules called fullerenes.

• d.

  It is transparent because the carbon atoms are arranged in a giant 3D tetrahedral lattice.

• a.

  Ammonia has a giant covalent structure whereas nitrogen is simple molecular.

• b.

  The covalent bonds in ammonia are stronger than the covalent bonds in nitrogen.

• c.

  Ammonia contains ionic bonds which require more energy to break than covalent bonds.

• d.

  Ammonia molecules are larger and have stronger intermolecular forces than nitrogen molecules.

• a.

  \(1.6\,nm^{-1}\)

• b.

  \(6.0\,nm^{-1}\)

• c.

  \(0.1\,nm^{-1}\)

• d.

  \(0.6\,nm^{-1}\)

Write your answer out first, then check it against the worked solution.

Write your answer out first, then check it against the worked solution.

Write your answer out first, then check it against the worked solution.