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.


    (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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