I say that xenon radius is smaller comparing to beryllium, but my friend says otherwise.
What I think is that xenon is down in periodic table comparing to beryllium (3 periods down) and it's far toward the right (16 groups ahead). So, the nuclear pull dominate (16 by 3 which is very big) and therefore xenon's radius is smaller than beryllium's.
My friends said that xenon is down in periodic table compared to beryllium and hence it's bigger and the nuclear pull effect has only little effect.
So who is right ?