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5 Written questions

4 Matching questions

  1. Si (type)
  2. α-quartz
  3. allotropes
  4. Kr
  1. a group 18 solid (aka atomic solid)
  2. b Network solid (3-D)
  3. c different structural modifications of an element; bonding is different
  4. d
    The most common form of silica (SiO₂) in nature.

5 Multiple choice questions

  1. molecular solid
  2. graphite (2-D network solid)
    diamond (3-D network solid)
    coke (highly carbonaceous amorphic solid)

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

  5. tetrahedral network

5 True/False questions

  1. Graphite (description of structure)layered, planar; can be described as a 2-dimensional lattice because covalent bonds occur only within sheets (planes) called graphenes; in each layer C atoms are arranged in a honeycomb-like lattice

          

  2. 2 allotropes of carbongraphite; diamond

          

  3. Fe (type)metallic solid

          

  4. Si (unit cell)

          

  5. H₂ (type)Network Solid (3-D)

          

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