Classification Of Elements And Periodicity In Properties Ques 14
Question: Which one of the following is the smallest in size [IIT 1989]
Options:
A) $ {{N}^{3-}} $
B) $ {{O}^{2-}} $
C) $ {{F}^{-}} $
D) $ N{{a}^{+}} $
Show Answer
Answer:
Correct Answer: D
Solution:
$ N{{a}^{+}}<{{F}^{-}}<{{O}^{2-}}<{{N}^{3-}} $ All are isoelectronic, effective number charge is highest for $ N{{a}^{+}} $ so it has smallest size.
