Which of the following sets of ions represents the collections of isoe

1.	Which of the following sets of ions represents the collections of isoelectronic species?
Answer» `K^(+), CA^(2+), Sc^(3+), Cl^(-)` `Na^(+), MG^(2+), Al^(3+), Cl^(-)` `K^(+), Cl^(-), Mg^(2+), Sc^(3+)` `Na^(+), Ca^(2+), Sc^(3+), F^(-)` Solution :

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