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

Calculate the number of atoms per unit cell in a face-centered cubic $(fcc)$ unit cell.

In a solid $AB$,$A$ atoms are in $ccp$ arrangement and $B$ atoms occupy all the octahedral sites. If two atoms from the opposite faces are removed,then the resultant stoichiometry of the compound is $A_{x} B_{y}$. The value of $x$ is ..... [nearest integer]

What does the unit cell of $CsCl$ contain?

Body centered cubic lattice has a coordination number of

What is the coordination number of a particle in $hcp$ structure?