1.

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

Answer»

`K^(+),Cl^(-),Mg^(2+),Sc^(3+)`
`Na^(+),Ca^(2+),SC^(3+),F^(-)`
`K^(+),Ca^(2+),Sc^(3+),Cl^(-)`
`Na^(+), Mg^(2+),AL^(3+), Cl^(-)`

Solution :Iso- electronic SPECIES are those which have same NUMBER of electrons `K^(+), Ca^(2+), Sc^(3+)` and `Cl^(-)` have 18 electrons each.


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