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7 Written Questions

6 Multiple Choice Questions

  1. When light falls on a metal it is almost totally absorbed since the bonding electrons can jump up to a broad band of energy levels allowing energy changes corresponding to the full range of frequencies in the visible region of the spectrum.

    These currents immediately re-emit the light out of the metal thus providing a strong reflection if the metal surface is smooth.
  2. Good: electrons are delocalized and relatively free to move
  3. Brittle: due to the repulsion of like charges caused when one layer slides across another layer.
  4. Hard: ionic lattice is strong and rigid
  5. formed between atoms of comparable radius, where one atom substitutes for the other in the lattice
  6. Poor: ionic lattices are rigid and once broken tend to cleave along an entire plane.

6 True/False Questions

  1. AlloysMetallic mixtures

          

  2. Identification of an ionic solidNon-conductive (insulators): ions are pinned by the rigid lattice.

          

  3. Conductivity of an ionic solidGood: electrons are delocalized and relatively free to move

          

  4. Interstitial Alloy (properties)interstitial atoms do not appreciably expand the lattice and so density is often substantially increased; interstitial atoms make the lattice more rigid reducing ductility and malleability

          

  5. Vapor pressure an of ionic solidHard: ionic lattice is strong and rigid

          

  6. Interstitial Alloy (definition)interstitial atoms do not appreciably expand the lattice and so density is often substantially increased; interstitial atoms make the lattice more rigid reducing ductility and malleability

          

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