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7 Written questions

6 Multiple choice questions

  1. Very Low: due to the strong Coulombic interactions of positive and negative ions arranged in a regular three-dimensional array.
  2. Malleable and ductile: deforming the solid does not change the environment immediately surrounding each metal core
  3. Soluble: the charged ions interact with the dipoles on the water molecules.
  4. Non-conductive (insulators): ions are pinned by the rigid lattice.
  5. Metallic mixtures
  6. 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 True/False questions

  1. Conductivity of a metallic solidNon-conductive (insulators): ions are pinned by the rigid lattice.

          

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

          

  3. Non-polar solubility of an ionic solidSoluble: the charged ions interact with the dipoles on the water molecules.

          

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

          

  5. Surface chemistry of an alloyAlloy formation sometimes alters the chemistry such as the formation of a chemically inert oxide layer in stainless steel.

          

  6. 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