Periodic1

its false.....actually, F is greater in size than Ne ...not F^-...

If F has greater size than Ne then we know F- has greater size than F so F- is greater than Ne so it should be true,the statement??

bt we always take size of noble gas atoms greater than other members of the period

hey these are isoelectronic species..for this there is a golden rule---
z increases,,,size decreases...

another size series is --
N^3- > O^2- > F^- > Na⁺ > Mg²⁺ > Al³⁺

I think ans given in the book is wrong..ur reasoning in post 3 is also right.

F- has to be bigger in size than F and thus Ne ...
bcz of the repulsion of the electrons ...
for eg: H- is very very big than H, and my prof even claimed that H- is almost the size of an Iodine atom ..... is it really ..or was he just being hyper

what is "typo" ? anyways, i a bit wrong here....actually i was confused between the relative sizes of cations and anions ! .....

Its simple guys! F- and Ne are isoelectronic. now the effective nuclear charge in F- is less than that in Ne(as the number of protons in F- is less than that in Ne),thus obviously implying that F- would have a greater size than Ne.