The ionic radii of $A^{+}$ and $B^{-}$ ions are $0.98 \times 10^{-10} \ m$ and $1.81 \times 10^{-10} \ m$. The coordination number of each ion in $AB$ is.......

In a hexagonal close packing $(hcp)$ lattice,each sphere touches ................... spheres in its own layer.

The number of unit cells present in $39 \ g$ of potassium if it crystallizes as a body-centered cubic $(BCC)$ structure is ($N = \text{Avogadro number}$, $\text{At. wt. of potassium} = 39$).

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

If the radius ratio limit is $0.414 - 0.732$,what will be the coordination number?

How many total constituent particles are present in a simple cubic unit cell?