What are primitive unit cells ?

What are the primitive and non-primitive unit cells ?

The void space in a primitive unit cell is :

The void space in a primitive unit cell is :

The number of atoms for primitive unit cell is ________, for body centred cubic unit cell is _______ and for face centred cubic unit cell is ___________.

Fill ups The number of atoms for primitive unit cell is…………….for body centred cubic unit cell is…………..and for face centred cubic unit cell is………….. .

How much is the empty space present in a primitive unit cell? Also calculate the total volume occupied.

How many atoms are present per unit cell in a primitive unit cell ?