Question

Give reason cations are always smaller than the parent atom.

Answer 1

Answer:

Cations are always smaller than their parent atoms this is because they have lesser electrons, while their nuclear charge remains the same. The remaining electrons are, therefore held more tightly by the protons in the nucleus and thus their radii.are smaller than the parent atoms. This is opposite in case of anions. Anions are always larger than their parent atomsbecause the addition of 1 or more electrons would result in increased repulsion among the electrons and a decrease in the effective nuclear charge.

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Answer 2

Answer:

A cation is formed when an atom donates an electron.

So, What happens is , the no. of protons becomes greater than the no. of electrons

Thus, A greater pull is generated by the nucleus to attract the electrons towards itself  which makes the atom smaller than the parent .