Select correct statement about radius of an atom :
Values of van der Waals' radii are larger than those of covalent radii because the van der Waals' forces are much weaker than the forces operating between atoms in a covalently bonded molecule.
The metallic radii are smaller than the van der Waals' radii, since the bonding forces in the metallic crystal lattice are much stronger than the van der Waals' forces.
Both are correct.
None is correct.
The internuclear distance is the distance crossing the path between the nuclei of the two linked atoms. The radius of an atom is equal to one-half of this internuclear distance. The van der Waal radius is the radius of the atom in which van der Waal forces exist.