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5 Written Questions

4 Matching Questions

  1. allotropes
  2. unit cell
  3. β-quartz
  4. Fe (type)
  1. a metallic solid
  2. b 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.
  3. c different structural modifications of an element; bonding is different
  4. d
    Formed from α-quartz at 846K.

5 Multiple Choice Questions

  1. 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-D network solid

  3. tetrahedral network
  4. group 18 solid (aka atomic solid)
  5. amorphous solid

5 True/False Questions

  1. SiO₂ (type)Network Solid (3-D)


  2. NaCl (structure)


  3. latticemetallic solid


  4. 2 allotropes of carbongraphite (2-D network solid)
    diamond (3-D network solid)
    coke (highly carbonaceous amorphic solid)


  5. 3 forms of C (carbon)graphite; diamond


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