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Which is a bigger ion among Na^(+), F^(-...

Which is a bigger ion among `Na^(+), F^(-), O^(2-)` and `Mg^(2+)`? Why?

Text Solution

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`O^(2-)` is bigger ion among the given four. Among isoelectronic ions, the more the negative charge on the ion, the more is its size.
The order is `O^(2-) > F^(-) > Na^(+) > Mg^(2+)`.
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