If $$a$$ is the length of the side of a cube, the distance between the body centered atom and one corner atom in the cube will be

A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm^$$-$$3. The molar mass of the metal is
(N_A Avogadro's constant = 6.02 $$ \times $$ 10²³ mol^$$-$$1)

The number of carbon atoms per unit cell of diamond unit cell is

Structure of a mixed oxide is cubic close packed (ccp). The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are cooupied by a monovalent metal B. The formula of the oxide is