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Manipal MET2015ChemistryClassification of Elements and Periodicity in Properties

Which of the following has largest ionic radius?

Options

  1. ACs ⁺
  2. BLi ⁺
  3. CNa ⁺
  4. DK ⁺

Correct answer

A. Cs ⁺

Step-by-step solution

Atomic and ionic radii increase from top to bottom in a group due to the inclusion of another shell at every step. Hence, Cs ⁺ ion will be the largest among given IA group ions, i.e. Na ⁺, Li ⁺ and K ⁺ .

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