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5 Written questions

5 Matching questions

  1. α-quartz
  2. Si (type)
  3. Silica (description of structure)
  4. β-quartz
  5. H₂O (type)
  1. a
    Formed from α-quartz at 846K.
  2. b Network solid (3-D)
  3. c molecular solid
  4. d has more polymorphs than almost any other structure
  5. e
    The most common form of silica (SiO₂) in nature.

5 Multiple choice questions

  1. different forms of crystal structure for the same solid material
  2. The smallest building block of a crystal, consisting of atoms, ions, or molecules, whose geometric arrangement defines a crystal's characteristic symmetry and whose repetition in space produces a crystal lattice.
  3. 2-D network solid
  4. Network Solid (3-D)
  5. metallic solid

5 True/False questions

  1. coke (type)amorphous solid


  2. Diamond (structure)
    tetrahedral network


  3. Graphite (structure)
    Graphenes (layers) are weakly held together by LDFs. As far as LDFs go they are strong because graphene layers are flat and large.


  4. Ag (type)metallic solid


  5. Si (unit cell)


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