1.

For N^(3-) gt O^(2-) gt F^(-) and Na^(+), the order in which their ionic radii varies is

Answer»

`N^(3) gt O^(2) gt F gt Na^(+)`
`N^(2) gt Na^(+) gt O^(2) gt F^(-)`
`Na^(+) gt O^(2)gt N^(3) gt F^(-)`
`O^(2) gt F^(-) gt Na^(+) gt N^(3-)`

Solution :`overset("Red hot")(N^(3-),O^(2-)), F^(-)` and `Na^(+)` are all isoelectronic species. As the atomic NUMBER increases , nuclear attraction increases, hence the order of ionic radii.
`N^(3-) gt O^(2-) gt F^(-) gt Na^(+)`


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