ChemistryWhich one of the following sets of ions represents a collection of isoelectronic species ?

Which one of the following sets of ions represents a collection of isoelectronic species ?

  1. A

    N3, O2−, F−, S2−

  2. B

    Li+, Na+, Mg2+, Ca2+

  3. C

    K+,Cl−,Ca2+,Sc3+

  4. D

    Ba2+, Sr2+,K+,Ca2+

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    Solution:

    K+,Cl−,Ca2+  and Sc+3 all have 18 electrons.

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