JEE Mains · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties
The ionic radii of \(\mathrm{F}^{-}\) and \(O^{2-}\) respectively are \(1.33\, A^o\) and \(1.4\, A^o\), while the covalent radius of \(\mathrm{N}\) is \(0.74\,A^o\) The correct statement for the ionic radius of \(\mathrm{N}^{3-}\) from the following is :
- A It is bigger than \(\mathrm{F}^{-}\)and \(\mathrm{N}\), but smaller than of \(\mathrm{O}^{2-}\)
- B It is smaller than \(\mathrm{O}^{2-}\) and \(\mathrm{F}^{-}\), but bigger than of \(\mathrm{N}\)
- C It is bigger than \(\mathrm{O}^{2-}\) and \(\mathrm{F}^{-}\)
- D It is smaller than \(\mathrm{F}^{-}\)and \(\mathrm{N}\)
Answer & Solution
Correct Answer
(C) It is bigger than \(\mathrm{O}^{2-}\) and \(\mathrm{F}^{-}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{F}^{-}, \mathrm{O}^{2-}\) and \(\mathrm{N}^{3-}\) all are isoelectronic species inwhich \(\mathrm{N}^{3-}\) have least number of protons due to which it's size increases as least nuclear attractionis experienced by the outer shell electrons. Size order…
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