In the fluorite structure,the coordination number of the $Ca^{2+}$ ion 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?

In a face-centred cubic $(FCC)$ unit cell,what is the contribution of an atom located at the face to the unit cell?

If the number of atoms per unit cell in a crystal is $2$,the structure of the crystal is:

How many unit cells are present in $39 \ g$ of potassium that crystallizes in a body-centered cubic $(BCC)$ structure? [Atomic weight of $K = 39$]

What is the coordination number of a particle in a simple cubic structure?