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NTA Abhyas JEE Main2020ChemistryClassification of Elements and Periodicity in PropertiesPractice

Arrange the given species F , F - , O and O - 2 in the order of their radii

Options

  1. AO 2 - > F - > O > F
  2. BO 2 - > F - > F > O
  3. CF - > O 2 - > F > O
  4. DO 2 - > O > F - > F

Correct answer

A. O 2 - > F - > O > F

Step-by-step 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 - .

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