(a) What is the difference between atomic structure and crystal
structure
(b) Sketch the BCC and the FCC unit cells and show that the
atomic packing factor for a BCC unit cell is 0.68.
(c) Molybdenum has a BCC unit cell, has an atomic radius of
0.1363 nm, and an atomic weight of 95.94 g mol. Compute its
theoretical density and compare your answer with its experimentally
measured density of 10.22 g cm³. The Avogadro’s number is
6.023x1023 atoms mol-...