Question
Which one of the following sets of ions represents a collection of isoelectronic species?
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K+ , Cl– , Ca2+, Sc3+
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Ba2+, Sr2+, K+ , S2–
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N3–, O2–, F– , S2–
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Li+ , Na+ , Mg2+, Ca2+
Solution
A.
K+ , Cl– , Ca2+, Sc3+
