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Solution


Q.

The statement(s) that are correct about the species O2-, F-, Na+ and Mg2+.

(A) All are isoelectronic
(B) All have the same nuclear charge
(C) O2- has the largest ionic radii
(D) Mg2+ has the smallest ionic radii

Choose the most appropriate answer from the options given below:           [2024]
1 (A), (B), (C) and (D)  
2 (B), (C) and (D) only  
3 (A), (C) and (D) only  
4 (C) and (D) only  

Ans.

(3)

For isoelectronic species, more are number of protons, more is effective nuclear charge hence smaller is the size.