Various metals pack in cubic unit cells. The density of a metal and length of the unit cell can be used to find out the type for packing. For instance sodium has a density of 0.968 g/cm3 and a unit cell side length a of 4.29 Å. (1 Å = 1. 10-8 cm.)
(a) Define how many sodium atoms are in exactly 1 cm3?
(b) Define how many unit cells are in exactly 1 cm3?
(c) Define how many sodium atoms are there per unit cell?
(d) The atoms/unit cell suggests that sodium packs as a unit cell.