Q.9:- What does atomic radius and ionic radius really mean to you?
Answer:-
Atomic radius:- The distance from the centre of nucleus to the outermost shell o electrons in the atom of any element is called its atomic radius. It refers to both covalen or metallic radius depending on whether the element is a non-metal or a metal.
Ionic radius:- The Ionic radii can be estimated by measuring the distances between cations and anions in ionic crystals.