Number of atoms per unit cell for body centered cubic system is

How many formula units are there in the unit cell of sodium chloride $(NaCl)$?

The number of atoms present in a simple cubic unit cell of a molecular substance is.....

Copper crystallises in a face-centred cubic lattice with a unit cell length of $361 \text{ pm}$. What is the radius of copper atom in $\text{pm}$?

The solid $AB$ has a $NaCl$ type structure. If the radius of the $A^{+}$ ion is $120 \, pm$, then the maximum radius of the $B^{-}$ ion will be ........... $pm$.

What is the total number of particles present in a base-centred unit cell?