Magnesium oxide has the rock salt crystal structure and a density of 3.58 g/cm3.(a) Determine the unit cell edge length.(b) How does this result compare with the edge length as determined from the...

Magnesium oxide has the rock salt crystal structure and a density of 3.58 g/cm3.(a) Determine the unit cell edge length.(b) How does this result compare with the edge length as determined from the radii in Table 12.3, assuming that the Mg2+ and O2- ions just touch each other along theedges?