The number of octahedral void$(s)$ per atom present in a cubic close-packed structure is

Percentages of free space in cubic close packed structure and in body centered packed structure are respectively

In a closed packed array of $N$ spheres,the number of tetrahedral holes is

Which of the following metals crystallizes in a hexagonal close-packed $(hcp)$ structure?

In a face-centred cubic lattice,atom $A$ occupies the corner positions and atom $B$ occupies the face-centred positions. If one atom of $B$ is missing from one of the face-centred points,the formula of the compound is

$A$ metal crystallizes in a simple cubic unit cell. Calculate the void volume of the unit cell. $[a = 3.36 \times 10^{-8} \text{ cm}]$