see lets solve it in a reverse order :- (d) metallic radius is only in case of metals, not in any other. so it is not the answer. (c) Vander waals radius is only in case of noble gases. so this also not the answer. (b) For ionic radius there should be the electronegativity differenceContinue reading “Which type of radius is formed by metalloid (a). Covalent radius (b).ionic radius (c).vander waal radius (d). Metallic radius?”