11th Class Chemistry Classification of Elements and Periodicity in Properties

  • question_answer 22) Consider the fallowing species: \[{{N}^{3-}},{{O}^{2-}},{{F}^{-}},N{{a}^{+}},M{{g}^{2+}}\] and \[A{{l}^{3+}}\] (a) What is common in them? (b) Arrange them in order of increasing ionic radii.

    Answer:

    (a) All have same number of electrons, i.e. they are isoelectronic species. (b) Radii of isoelectronic species increase with decrease in nuclear charge, i.e., atomic number. \[A{{l}^{3+}}

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