Potassium crystallizes with a

An element has a body-centered cubic $(BCC)$ structure with an edge length of $288 \ pm$. The density of the element is $7.2 \ g/cm^3$. How many atoms are present in $208 \ g$ of the element?

For an ionic crystal $A^{+}B^{-}$ with coordination number $6$,the radius ratio will be

What is the coordination number of sodium ions in the case of sodium chloride structure?

Which type of cubic lattice has the maximum number of atoms per unit cell?

In $FCC$ lattice,alternate tetrahedral voids are occupied in which of the following?