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7 Written questions

6 Multiple choice questions

  1. Malleable and ductile: deforming the solid does not change the environment immediately surrounding each metal core
  2. formed between atoms of different radius, where the smaller atoms fill the interstitial spaces between the larger atoms
  3. Hard: ionic lattice is strong and rigid
  4. Very Low: due to the strong Coulombic interactions of positive and negative ions arranged in a regular three-dimensional array.
  5. density is usually between that of the component metals; alloy remains malleable and ductile
  6. Non-conductive (insulators): ions are pinned by the rigid lattice.

6 True/False questions

  1. AlloysMetallic mixtures

          

  2. Optical properties of metal (explained)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.

          

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

          

  4. 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

          

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

          

  6. 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.

          

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