The structure of $TlCl$ is similar to $CsCl$. What is the coordination number of $Tl^{+}$?

Explain the calculation of the number of atoms in a primitive cubic unit cell.

In a diamond crystal,each carbon atom is linked with other carbon atoms. The number of carbon atoms in a diamond unit cell is:

An example of fluorite structure is

$Na$ and $Mg$ crystallise in $b.c.c.$ and $f.c.c.$ type crystals respectively. The number of atoms of $Na$ and $Mg$ present in the unit cell of their respective crystals is:

In the calcium fluoride structure,the coordination number of the cation and anion are respectively: