In a face-centered cubic $(FCC)$ unit cell,what fraction of an atom located at the face center is shared by one unit cell?

Find the radius of an atom in $fcc$ unit cell having edge length $393 \ pm$. (in $pm$)

An ionic compound $AB$ has $ZnS$ type structure. If the radius of $A^{+}$ is $22.5 \ pm$, then the ideal radius of $B^{-}$ would be .............. $pm$.

$CsCl$ crystallises in a body-centred cubic $(BCC)$ lattice. If '$a$' is its edge length,then which of the following expressions is correct?

The number of octahedral voids in a unit cell of a cubical closest packed structure is

The first three nearest neighbour distances for a body-centered cubic $(BCC)$ lattice are respectively: