1.

Which of the following grouping represents a collection of iso-electionic species?

Answer»

`Ca^(2+),CS^(2+),Br`
`NA^(+),Ca^(2+),Mg^(2+)`
`N^(3-),F^(-),Na^(+)`
`Be,AL^(3+),Cl^(+)`

Answer :C


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