In an ionic compound,the unit cell has $A$ ions at the corners and $B$ ions at the face centers. What is the empirical formula of the compound?

In a face-centered cubic arrangement of atoms $A$ and $B$,atoms $A$ are at the corners of the unit cell and atoms $B$ are at the face centers. If one atom $A$ is missing from one corner of the unit cell,what is the simplest formula of the compound?

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

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

An ionic compound has a unit cell consisting of $A$ ions at the corners of a cube and $B$ ions on the centres of the faces of the cube. The empirical formula for this compound would be

Which of the following contains rock salt structure?