7 Written questions
6 Multiple choice questions
- Hard: ionic lattice is strong and rigid
- 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.
- Malleable and ductile: deforming the solid does not change the environment immediately surrounding each metal core
- Good: electrons are delocalized and relatively free to move
- Metallic mixtures
- 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
Conductivity of alloys → Non-conductive (insulators): ions are pinned by the rigid lattice.
Brittleness of an ionic solid → Hard: ionic lattice is strong and rigid
Vapor pressure an of ionic solid → Very Low: due to the strong Coulombic interactions of positive and negative ions arranged in a regular three-dimensional array.
Surface chemistry of an alloy → Alloy formation sometimes alters the chemistry such as the formation of a chemically inert oxide layer in stainless steel.
Conductivity of an ionic solid → Good: electrons are delocalized and relatively free to move
Malleability and ductility of an ionic solid → Malleable and ductile: deforming the solid does not change the environment immediately surrounding each metal core