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A cation is always smaller than atom because

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An Intiative by Sri Chaitanya

the nuclear charge remains the same while inter-electronic repulsion increases

by loss of one or more electrons, the last shell of the atom may vanish

the attraction of nucleus, i.e., protons per electron increases

both (a) and (c)

answer is D.

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Cations are smaller than anions as in case of cations effective nuclear charge on valence electrons increases

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