The $FCC$ crystal contains how many atoms in each unit cell?

Diamond has a three-dimensional structure of $C$ atoms formed by covalent bonds. The structure of diamond has a face-centered cubic $(FCC)$ lattice where $50\,\%$ of the tetrahedral voids are also occupied by carbon atoms. The number of carbon atoms present per unit cell of diamond is $......$

In zinc blende structure,the coordination number of $Zn^{2+}$ ion is

What is the coordination number of any particle in the $fcc$ (face-centered cubic) crystal lattice?

An $fcc$ unit cell of aluminium contains the equivalent of how many atoms?

What is the coordination number in a calcium fluoride $(CaF_2)$ type structure?