Which one of the following sets of ions represents the collection of isoelectronic species? (Atomic nos. : F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20, Sc = 21)

Question

K⁺, Cl^-, Mg²⁺, Sc³⁺

Na⁺, Ca²⁺, Sc³⁺, F^-

K⁺, Ca²⁺, Sc³⁺, Cl^-

Na⁺, Mg²⁺, Al³⁺, Cl^-

Solution

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