Which of the following order of ionic-radius is correct?

  1. A

    F>O2>N3

  2. B

    Na+>Mg+2>Al+3

  3. C

    H>H<H+

  4. D

    Fe<Fe+2<Fe+3

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    Solution:

    The correct option is (b)
    explanation
    ion      Radius(pm)       Atomic Number
    Na+         98                      11
    Mg+2      79                      12
    Al+3        57                      13

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