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JEE Main Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main

The increasing order of the ionic radii of the given isoelectronic species is

Answer: (B)

Solution

, , and are all isoelectronic (18 electrons each, argon-like) with increasing nuclear charge in the order . For a fixed number of

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Question ID VK-133373