Question

why cation radius smaller than anion radius​

Answer 1

Answer:

In general, anions are larger than the corresponding neutral atom, since adding electrons increases the number of electron-electron repulsion interactions that take place. Cations are smaller than the corresponding neutral atoms, since the valence electrons, which are furthest away from the nucleus, are lost.

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Answer 2

Answer:

Cations are smaller in size because they are formed by loss of electrons and anions are larger in size because they are formed by the gain of electrons. ... The remaining electrons are, therefore held more tightly by the protons in the nucleus and thus their radii. are smaller than the parent atoms.