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5 Written questions

5 Matching questions

  1. NaCl (type)
  2. SiO₂(name)
  3. β-quartz
  4. Graphite (structure)
  5. unit cell
  1. a 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.
  2. b ionic solid
  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
    Formed from α-quartz at 846K.
  5. e Silicon dioxide, (aka) silica, (most commonly found in nature as) quartz

5 Multiple choice questions

  1. Network solid (3-D)
  2. Network Solid (3-D)
  3. different structural modifications of an element; bonding is different
  4. 2-D network solid

5 True/False questions

  1. 3 forms of C (carbon)graphite (2-D network solid)
    diamond (3-D network solid)
    coke (highly carbonaceous amorphic solid)

          

  2. CO₂molecular solid

          

  3. 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

          

  4. H₂ (type)Network Solid (3-D)

          

  5. NaCl (structure)
    tetrahedral network