Verified Solution • 2025–26 Session moderate

QJEEM21Ch4ce1: JEE Main 2021 Chemistry - Class 11 JEEM21Ch4ce1 Solution: The ionic radii of F and O 2 respectively are 1.33 and 1.4 ,…

The ionic radii of F −- and O2 −- respectively are 1.33 Ao\mathop A\limits^o and 1.4 Ao\mathop A\limits^o , while the covalent radius of N is 0.74 Ao\mathop A\limits^o .

The correct statement for the ionic radius of N3 −- from the following is :

Multiple Choice Options

  • A It is smaller than F −- and N
  • B It is bigger than O2 −- and F −-
  • C It is bigger than F −- and N, but smaller than of O2 −-
  • D It is smaller than O2 −- and F −- , but bigger than of N

Step-by-Step Verified Solution

F −- , O2 −- and N3 −- all are isoelectronic species in which N3 −- have least number of protons due to which it's size increases as least nuclear attraction is experienced by the outer shell electrons. Size order

N3 −- > O2 −- > F −-

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