KCET2013ChemistryStructure of Atom
Which one of the following sets of ions represents the collection of isoelectronic species?
Options
- AK ⁺, Cl ⁻, Mg ²⁺, Sc ³⁺
- BNa ⁺, Ca ²⁺, Sc ³⁺, F ⁻
- CK ⁺, Ca ²⁺, Sc ³⁺, Cl ⁻
- DNa ⁺, Mg ²⁺, Al ³⁺, Cl ⁻
Correct answer
C. K ⁺, Ca ²⁺, Sc ³⁺, Cl ⁻
Step-by-step solution
The number of electrons in these species are Na ⁺, Mg ²⁺, Al ³⁺ and F ⁻ are isoelectronic species and each one of which has 10. Also, K ⁺, Ca ²⁺, SC ³⁺ and Cl ⁻ are electronic species and each one of which has 18 electrons.