A) \[{{K}^{+}},C{{l}^{-}},N{{a}^{+}}\]
B) \[{{K}^{+}},C{{l}^{-}},C{{a}^{2+}}\]
C) \[{{F}^{-}},A{{l}^{3+}},{{K}^{+}}\]
D) \[F{{e}^{2+}},C{{u}^{2+}},{{V}^{3+}}\]
Correct Answer: B
Solution :
Isoelectronic species have same number of electrons. \[{{K}^{+}}\]number of electrons =18 \[C{{l}^{-}}\]number of electrons = 18 \[C{{a}^{2+}}\]number of electrons = 18 Hence,\[{{K}^{+}},C{{l}^{-}}\]and\[C{{a}^{2+}}\]are isoelectronic species.
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