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JEE Main2006ChemistryStructure of AtomActual

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

Options

  1. AK ⁺, Cl ⁻, Ca ²⁺, Sc ³⁺
  2. BBa ²⁺, Sr ²⁺, K ⁺, S ²⁻
  3. CN ³⁻, O ²⁻, F ⁻, S ²⁻
  4. DLi ⁺, Na ⁺, Mg ²⁺, Ca ²⁺

Correct answer

A. K ⁺, Cl ⁻, Ca ²⁺, Sc ³⁺

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