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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. Non-conductive (insulators): ions are pinned by the rigid lattice.
  3. density is usually between that of the component metals; alloy remains malleable and ductile
  4. formed between atoms of different radius, where the smaller atoms fill the interstitial spaces between the larger atoms
  5. Soluble: the charged ions interact with the dipoles on the water molecules.
  6. 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.

6 True/False questions

  1. Brittleness of an ionic solidBrittle: due to the repulsion of like charges caused when one layer slides across another layer.

          

  2. Identification of an ionic solidUnable to conduct electricity as a solid; soluble in water; aqueous solution conducts electricity

          

  3. AlloysMetallic mixtures

          

  4. Malleability and ductility of an ionic solidPoor: ionic lattices are rigid and once broken tend to cleave along an entire plane.

          

  5. Hardness of an ionic solidBrittle: due to the repulsion of like charges caused when one layer slides across another layer.

          

  6. Substitutional Alloy (definition)formed between atoms of comparable radius, where one atom substitutes for the other in the lattice

          

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