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  3. Chemistry
  4. Arrange the given species F,F-,O and O- 2 in the order of their radii

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Q. Arrange the given species $F,F^{-},O$ and $O^{- 2}$ in the order of their radii

NTA AbhyasNTA Abhyas 2020Classification of Elements and Periodicity in Properties

Solution:

Atomic radius decreases on going from left to right in a period. Thus size of $O>F$ and size of anion is larger then their atoms. As $O^{2 -}$ and $F^{-}$ are isoelectronic, therefore, size of $O^{2 -}>F^{-}.$