7 Written questions
6 Multiple choice questions
- 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.
- formed between atoms of comparable radius, where one atom substitutes for the other in the lattice
- Alloy formation sometimes alters the chemistry such as the formation of a chemically inert oxide layer in stainless steel.
- When light falls on a metal it is almost totally absorbed since the bonding electrons can jump up to a broad band of energy levels allowing energy changes corresponding to the full range of frequencies in the visible region of the spectrum.
These currents immediately re-emit the light out of the metal thus providing a strong reflection if the metal surface is smooth.
- formed between atoms of different radius, where the smaller atoms fill the interstitial spaces between the larger atoms
- 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
Brittleness of an ionic solid → Brittle: due to the repulsion of like charges caused when one layer slides across another layer.
Water solubility of an ionic solid → Soluble: the charged ions interact with the dipoles on the water molecules.
Vapor pressure an of ionic solid → Hard: ionic lattice is strong and rigid
Identification of an ionic solid → Non-conductive (insulators): ions are pinned by the rigid lattice.
Conductivity of a metallic solid → Non-conductive (insulators): ions are pinned by the rigid lattice.
Malleability and ductility of a metallic solid → Malleable and ductile: deforming the solid does not change the environment immediately surrounding each metal core