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

Options

A. `K^(+),Cl^(-),Mg^(2+),Si^(3+)`
B. `Na^(+),Ca^(2+),Si^(3+),F^(-)`
C. `K^(+),Ca^(2+),Si^(3+),Cl^(-)`
D. `Na^(+),Mg^(2+),Al^(3+),Cl^(-)`

Answer

C

Explanation

`K^(+) (19-1=18) , Cl^(-) (17+1-18) , Ca^(2+) (20-2=18) Se^(3+) (21-3=18) `represents a collections of isoelectronic species.