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5 Written questions

5 Matching questions

  1. Si (structure)
  2. Si (unit cell)
  3. SiO₂(name)
  4. U (type)
  5. Graphite (structure)
  1. a
  2. b Silicon dioxide, (aka) silica, (most commonly found in nature as) quartz
  3. c
    Graphenes (layers) are weakly held together by LDFs. As far as LDFs go they are strong because graphene layers are flat and large.
  4. d
    tetrahedral network
  5. e metallic solid

5 Multiple choice questions

  1. graphite (2-D network solid)
    diamond (3-D network solid)
    coke (highly carbonaceous amorphic solid)
  2. amorphous solid
  3. different structural modifications of an element; bonding is different
  4. Network solid (3-D)

  5. The most common form of silica (SiO₂) in nature.

5 True/False questions

  1. NaCl (type)ionic solid


  2. H₂O (type)Network Solid (3-D)


  3. Fe (type)metallic solid


  4. β-quartz
    Formed from α-quartz at 846K.


  5. SiC (structure)
    tetrahedral network