question_answer 106)

                                                  In which of the following pairs, the ions are isoelectronic? (a) \[N{{a}^{+}},M{{g}^{2+}}\]                   (b) \[A{{l}^{3+}},{{O}^{-}}\] (c) \[N{{a}^{+}},{{O}^{2-}}\]                        (d) \[{{N}^{3-}},C{{l}^{-}}\]

Answer:

  (a, c) Isoelectronic species have same number of electrons. (a) \[N{{a}^{+}},M{{g}^{2+}}\] have 10 electrons each. (c) \[N{{a}^{+}},{{O}^{2-}}\] have 10 electrons each.