In an end-centered unit cell,the body diagonal contains two additional atoms. What is the total number of atoms present in the unit cell?

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

Structure similar to zinc blende is found in

$A$ solid compound contains atoms $X, Y,$ and $Z$. In its unit cell,atoms $X$ are at the corners,atoms $Y$ are at the body center,and atoms $Z$ are at the face centers. The formula of the compound is:

The number of nearest neighbours and next nearest neighbours of an $Na^{+}$ ion in a crystal of $NaCl$ are respectively

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