How many formula units are present in the unit cell of fluorite $(CaF_2)$?

The structure of $MgO$ is similar to $NaCl$. What would be the coordination number of magnesium?

The edge length of a face-centered cubic unit cell of an ionic substance is $508 \ pm$. If the radius of the cation is $110 \ pm$, what is the radius of the anion in $pm$?

The number of unit cells present in $39 \ g$ of potassium if it crystallizes as a body-centered cubic $(BCC)$ structure is ($N = \text{Avogadro number}$, $\text{At. wt. of potassium} = 39$).

The $Ca^{2+}$ and $F^{-}$ ions are located in $CaF_2$ crystal,respectively,at face-centered cubic lattice points and in

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