(A) In Body-centred cubic lattice, 68% of space is occupied. 32% of the space is empty.
(B) CsCl has body centered lattice.
(C) Hexagonal close packing in three (r) dimensions is also called ABAB type of close packing.
(D) Na2O has antifluorite structure.
(E) Diamond is an example of covalent crystal.