Question

(b)The size of the cation is always smaller than its parent atom whereas the size of
the anion is larger than its parent atom. Explain with suitable pictorial
representation​

Answer 1

1. when the parent atom loses one electron it becomes cation ...now as the no of protons is comparatively higher in the atom with respect to electrons...the nucleus will tend to attract the outer shells electron more...which results in increase in Zeff and decrease of cation size
2. when the parent atom gains electron it will increase the shell no. plus ...the repulsion from other electrons will be comparatively higher....as there are overall more electrons in the atom...and all factors ultimately increase the anion size

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