Passage : The distance of outermost shell of an anion or cation to its nucleus is called ionic radius.  The radius of the cation is always smaller than the atomic radius of parent atom.  eg: ${\text{Na}}^{+}<\text{\hspace{0.17em}\hspace{0.17em}Na}$. The

radius of the anion is always larger than the atomic radius of the parent atom.  eg:  $\text{C}{l}^{-}>\text{C}l$

1) Fill in the gap with appropriate symbol; Radius of cation ______atomic radius of parent atom.