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7 Written questions

6 Multiple choice questions

  1. Unable to conduct electricity as a solid; soluble in water; aqueous solution conducts electricity
  2. formed between atoms of comparable radius, where one atom substitutes for the other in the lattice
  3. Shiny, reflective, lustrous: because electrons move freely throughout the metal. Metals are shiny because of the very strong absorption of light by the delocalised bonding electrons.
  4. Soluble: the charged ions interact with the dipoles on the water molecules.
  5. formed between atoms of different radius, where the smaller atoms fill the interstitial spaces between the larger atoms
  6. Brittle: due to the repulsion of like charges caused when one layer slides across another layer.

6 True/False questions

  1. Vapor pressure an of ionic solidVery Low: due to the strong Coulombic interactions of positive and negative ions arranged in a regular three-dimensional array.

          

  2. AlloysMetallic mixtures

          

  3. Conductivity of alloysGood: alloys usually retain a sea of mobile electrons (delocalized covalent bonds) and so remain conducting (for both HEAT and ELECTRICITY)

          

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

          

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

          

  6. Non-polar solubility of an ionic solidInsoluble: 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.

          

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