1.

Consider the isoelectric species Na^(+), Mg^(2+),F^(-) and O^(2-). The correct order of increasing length of their radii is

Answer»

`F^(-) LT O^(2-) lt MG^(2+) lt Na^(+)`
`Mg^(2+) lt Na^(+) lt F^(-) lt O^(2-)`
`O^(2-) lt F^(-) lt Na^(+) lt Mg^(2+)`
`O^(2-) lt F^(-) lt Mg^(2+) lt Na^(+)`

ANSWER :B


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