By increasing the pressure on $NaCl$ crystal,its coordination number will

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

Potassium crystallizes in a $bcc$ lattice,hence the coordination number of potassium in potassium metal is

$A$ compound formed by elements $A$ and $B$ crystallizes in a cubic structure where $A$ atoms are at the corners of the cube and $B$ atoms are at the center of the cube. What is the formula of the compound?

The structure of $TlCl$ is similar to $CsCl$. What would be the radius ratio in $TlCl$?

What is the coordination number of each atom in $hcp$ or $ccp$ structure?