The number of hexagonal faces that are present in a truncated octahedron is

If three elements $A, B, C$ crystallize in a cubic solid lattice with $B$ atoms at the cubic centers, $C$ atoms at the center of edges, and $A$ atoms at the corners, then the formula of the compound is

In a simple cubic unit cell,how many unit cells share each lattice point located at the corner?

In a face-centered cubic arrangement of atoms $A$ and $B$,atoms $A$ are at the corners of the unit cell and atoms $B$ are at the face centers. If one atom $A$ is missing from one corner of the unit cell,what is the simplest formula of the compound?

What is the total number of unit cells shared by each corner particle of a $bcc$ unit cell?

Which of the following structures is not correctly matched?