Germanium (Ge) has a diamond lattice with an atomic density of 4.42x10^22 atoms/cm^3, while aluminum (Al) is a face-centered cubic with atomic density of 6.02x10^22 atoms/cm^3.


Required:

a. Calculate the lattice parameter a for Ge and Al.

b. Determine the number of atoms/cm^2 on the (100), (110), and (111) surfaces for Ge and Al