1. Lead (at room temperature) has FCC crystal structure. If the atomic diameter of lead is 0.35 nm and the atomic weight is 207.2 g/mol, calculate the density of lead. Compare the result to literature values and discuss the possible origin for any deviation.
Crystalline solids:
1. a) Name and briefly explain three major types of defects that can be observed in crystalline solids.
2. b) Why do defects result in an increase of the energy of a material?
3. c) Experimentally it is observed that atoms that are located along grain boundary defects are more reactive that atoms that are located within a crystal grain. Briefly explain the origin for this observation.