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Solution


Q.

The incorrect decreasing order of atomic radii is                  [2025]
1 Mg > Al > C > O  
2 Be > Mg > Al > Si  
3 Al > B > N > F  
4 Si > P > Cl > F  

Ans.

(2)

Radius increases down the group because of more number of shells, hence radius of Mg is more than that of Be.