In a face-centered cubic lattice,a unit cell face is shared equally by how many unit cells?

In a face-centred cubic $(FCC)$ unit cell,what is the contribution of an atom located at the face to the unit cell?

The edge length of the unit cell of $NaCl$ crystal lattice is $552 \, pm$. If the ionic radius of the sodium ion is $95 \, pm$, what is the ionic radius of the chloride ion in $pm$?

In a diamond crystal,each carbon atom is linked with other carbon atoms. The number of carbon atoms in a diamond unit cell is:

$A$ solid $A^{+}B^{-}$ has a $NaCl$ type close-packed structure. If the radius of the anion is $250 \ pm$, what should be the ideal radius of the cation in $pm$?

The edge length of a face-centred cubic unit cell is $508 \ pm$. If the radius of the cation is $110 \ pm$, the radius of the anion is .............. $pm$.