7 Written questions
6 Multiple choice questions
- Very Low: due to the strong Coulombic interactions of positive and negative ions arranged in a regular three-dimensional array.
- Malleable and ductile: deforming the solid does not change the environment immediately surrounding each metal core
- Soluble: the charged ions interact with the dipoles on the water molecules.
- Non-conductive (insulators): ions are pinned by the rigid lattice.
- 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 a metallic solid → Non-conductive (insulators): ions are pinned by the rigid lattice.
Malleability and ductility of an ionic solid → Poor: ionic lattices are rigid and once broken tend to cleave along an entire plane.
Non-polar solubility of an ionic solid → Soluble: the charged ions interact with the dipoles on the water molecules.
Substitutional Alloy (definition) → formed between atoms of comparable radius, where one atom substitutes for the other in the lattice
Surface chemistry of an alloy → Alloy formation sometimes alters the chemistry such as the formation of a chemically inert oxide layer in stainless steel.
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