What is the number of unit cells in one mole of an atom of a metal that forms a simple cubic structure?

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 $pm$?

Which of the following expressions is correct for a sodium chloride $(NaCl)$ unit cell with edge length $a$?

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 $pm$?

In $NaCl$ lattice,the coordination number of $Cl^{-}$ ion is:

In a face-centered cubic $(FCC)$ arrangement,atoms $A$ are present at the corners and atoms $B$ are present at the face centers. If $4$ atoms of $A$ are removed from the corners,what is the empirical formula of the compound?