JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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The correct order of size among

\mathrm{O}, \mathrm{O}^{2-}, \mathrm{F}

and

\mathrm{F}^{-}

is:

View answer and explanation

Correct option: D

\mathrm{O}^{2-}>\mathrm{F}^{-}>\mathrm{O}>\mathrm{F}

Option D (

\mathrm{O}^{2-}>\mathrm{F}^{-}>\mathrm{O}>\mathrm{F}

) is correct because anions are larger than their neutral atoms, and for isoelectronic species, size decreases with increasing nuclear charge.

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