JEE Main202125 Jul 2021Evening ShiftChemistryClassification of Elements and Periodicity in PropertiesActual
The ionic radii of F - and O 2 - respectively are 1 . 33 A and 1 . 4 A , while the covalent radius of N is 0 . 74 A The correct statement for the ionic radius of N 3 - from the following is :
Options
- AIt is smaller than F - and N
- BIt is bigger than O 2 - and F -
- CIt is bigger than F - and N , but smaller than of O 2 -
- DIt is smaller than O 2 - and F - , but bigger than of N
Correct answer
B. It is bigger than O 2 - and F -
Step-by-step solution
F - , O 2 - and N 3 - all are isoelectronic species in which N 3 - 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 N 3 - > O 2 - > F -