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Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryClassification of Elements and Periodicity in Properties1 Mark
MCQ
Which of the following orders of ionic radius is correctly represented?
  • A
    H- > H > H+
  • B
    Na+ > F- > O2-
  • C
    F- > O2- > Na+
  • D
    Al3+ > Mg2+ > N3-
✓

Answer

  1. H- > H > H+

Explanation:

Radius of a cation is always smaller than that of a neutral atom due to decrease in the number of orbitals whereas, the radius of anion is always greater than cation due to decrease in effective nuclear charge.

Hence, the order given in option (a) is correct.

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