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5 Written questions

5 Matching questions

  1. Graphite (structure)
  2. Pb (type)
  3. SiO₂(name)
  4. Silica (description of structure)
  5. SiC (type)
  1. a metallic solid
  2. b has more polymorphs than almost any other structure
  3. c Network solid (3-D)
  4. d
    Graphenes (layers) are weakly held together by LDFs. As far as LDFs go they are strong because graphene layers are flat and large.
  5. e Silicon dioxide, (aka) silica, (most commonly found in nature as) quartz

5 Multiple choice questions

  1. The most common form of silica (SiO₂) in nature.
  2. graphite (2-D network solid)
    diamond (3-D network solid)
    coke (highly carbonaceous amorphic solid)
  3. molecular solid

  4. 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. β-quartz
    The most common form of silica (SiO₂) in nature.


  3. H₂ (type)molecular solid


  4. Si (type)metallic solid


  5. latticemetallic solid