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Which ion has the largest radius?
Se2-, F-, O2-, Rb+

Please give explanation also.

Dear student,

17.
The left to right moving in periodic table the nuclear attraction between nucleus and electrons increases and the size decreases.
While moving down the group as the number of shells increases the radius increases.
R b to the power of plus space f r o m space 1 space s t space g r o u p space a n d space 5 t h space p e r i o d space. O to the power of 2 minus end exponent space a n d space F to the power of minus space a r e space f r o m space 2 n d space p e r i o d space a n d space i n space t h e space r i g h t space o f space p e r i o d i c space t a b l e. S e to the power of 2 minus end exponent space f r o m space g r o u p space 16 space a n d space 4 t h space p e r i o d space. space O r d e r space o f space r a d i u s space o f space i o n s space colon space F to the power of minus space less than space O to the power of 2 minus end exponent space less than space S e to the power of 2 minus end exponent space less than space R b to the power of plus

Regards
 

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