Identify the wrong statement in the following

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Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius

Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius

Atomic radius of the elements increases as one moves down the group of the periodic table

Atomic radius of the elements decreases as one moves across from left to right in the 2nd period of the periodic table

answer is A.

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Detailed Solution

Atomic radius of the elements decreases across a period from left to right due to increase in effective nuclear charge. On moving down a group, since number of shells increases, so atomic radius increases.Amongst isoelectronic species, ionic radius increases with increase in negative charge and decrease in positive charge.

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