Question

1. Aluminum has a face centered cubic (fcc) structure with anatomic radius of 0.143 nm and an atomic weight of 26.98 g/mol. (a)Calculate the density of Al from this information. (b) What is theplanar density of atoms in the (110) plane (and sketch how they arearranged).

2. The density of niobium is 8.58 g/cm3. It's atomic mass is92.91 g/mol and its structure is bcc. (a) calculate the latticparameter and the atomic radius from this information. (b) What isthe planar density of atoms in the (110) plane (and sketch how theyare arranged).