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7 Written questions

6 Multiple choice questions

  1. Brittle: due to the repulsion of like charges caused when one layer slides across another layer.
  2. Insoluble: ionic compounds tend not to dissolve in nonpolar solvents because the attractions between ions are much more favorable than the attractions among the separated ions and nonpolar solvent molecules.
  3. formed between atoms of different radius, where the smaller atoms fill the interstitial spaces between the larger atoms
  4. Non-conductive (insulators): ions are pinned by the rigid lattice.
  5. 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
  6. 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.

6 True/False questions

  1. Malleability and ductility of a metallic solidMalleable and ductile: deforming the solid does not change the environment immediately surrounding each metal core

          

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

          

  3. Malleability and ductility of an ionic solidMalleable and ductile: deforming the solid does not change the environment immediately surrounding each metal core

          

  4. Conductivity of a metallic solidGood: electrons are delocalized and relatively free to move

          

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

          

  6. Conductivity of alloysNon-conductive (insulators): ions are pinned by the rigid lattice.

          

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