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7 Written questions

6 Multiple choice questions

  1. Non-conductive (insulators): ions are pinned by the rigid lattice.
  2. 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
  3. Brittle: due to the repulsion of like charges caused when one layer slides across another layer.
  4. Alloy formation sometimes alters the chemistry such as the formation of a chemically inert oxide layer in stainless steel.
  5. Malleable and ductile: deforming the solid does not change the environment immediately surrounding each metal core
  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. Substitutional Alloy (properties)formed between atoms of comparable radius, where one atom substitutes for the other in the lattice

          

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

          

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

          

  4. 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.

          

  5. Optical properties of metals (list and reason)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.

          

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