Which of the following sequences is correct for decreasing order of ionic radius?

S e^{2 -} > I^{-} > B r^{-} > O^{2 -} > F^{-}

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I^{-} > S e^{2 -} > O^{2 -} > B r^{-} > F^{-}

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S e^{2 -} > I^{-} > B r^{-} > F^{-} > O^{2 -}

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I^{-} > S e^{2 -} > B r^{-} > O^{2 -} > F^{-}

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Solution

The correct option is D $I^{-} > S e^{2 -} > B r^{-} > O^{2 -} > F^{-}$
The size increases with increasing number of shells, irrespective of the charge. And if number of shells are same, more negative ion is larger. Thus correct order is
$I^{-} > {S e}^{2 -} > {B r}^{-} > O^{2 -} > F^{-}$

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Similar questions

Among the following species, how many have their ionic size greater than $O^{2 -}$ ?___

$S e^{2 -}, F^{-}, N^{3 -}, P^{3 -}$

Q. The correct order of polarizability is

I^{-}, B r^{-}, C l^{-}, F^{-}

Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy ) is
(a) F > Cl > Br > I (b) F < Cl < Br < I (c) F < Cl > Br > I (d) F < Cl < Br < I

Q. The correct order of increasing radii of the ions

B r^{-}, F^{-}, O^{2 -}

and

S^{2 -}

is as follows:

Q. The decreasing order of electron affinity is:

F > C l > B r > I

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Which of the following sequences is correct for decreasing order of ionic radius?

The correct option is D I−>Se2−>Br−>O2−>F−The size increases with increasing number of shells, irrespective of the charge. And if number of shells are same, more negative ion is larger. Thus correct order is I−>Se2−>Br−>O2−>F−

The correct option is D $I^{-} > S e^{2 -} > B r^{-} > O^{2 -} > F^{-}$
The size increases with increasing number of shells, irrespective of the charge. And if number of shells are same, more negative ion is larger. Thus correct order is
$I^{-} > {S e}^{2 -} > {B r}^{-} > O^{2 -} > F^{-}$