I ion is known to exist but not  F ion. Explain the reason after assigning Lewis 3 structures for both the ions.

I ion is known to exist but not  F ion. Explain the reason after

1.	I ion is known to exist but not  F ion. Explain the reason after assigning Lewis 3 structures for both the ions.
Answer» n exists but F 3- DOESNOT exist.When we see the lewis dot structure of both the ELEMENTS below, we can see F2- has octet structure, I3- has more electrons than octet.Some elements can afford more electrons than octet structure.This is because IODINE has d orbital in its electronic CONFIGURATION, where as Florine doesnot.Iodine accomodates its more electrons in the d orbital and forms I3- ion when needed.But Florine due to lack of d orbital cannot accomodate any more electrons than COMPLETE octet.