Calculate the radius of an atom of an element in pm if it forms bcc unit cell structure having edge length $4.3 \times 10^{-8} \mathrm{~cm}$.

The attractive interactions between cations and mobile electrons in metallic solid is called

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

The compound forming ccp structure contains $9.6 \times 10^{23}$ atoms. Find the number of tetrahedral voids formed in it.