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5 Written questions

5 Matching questions

  1. allotropes
  2. α-quartz
  3. Diamond (type)
  4. Graphite (description of structure)
  5. lattice
  1. a
    The most common form of silica (SiO₂) in nature.
  2. b 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
  3. c a regular, repeating array of atoms or ions
  4. d different structural modifications of an element; bonding is different
  5. e Network solid (3-D)

5 Multiple choice questions

  1. metallic solid
  2. Silicon dioxide, (aka) silica, (most commonly found in nature as) quartz
  3. amorphous solid
  4. molecular solid
  5. molecular solid

5 True/False questions

  1. SiO₂ (type)molecular solid

          

  2. Fe (type)metallic solid

          

  3. Silica (description of structure)has more polymorphs than almost any other structure

          

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

          

  5. 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.