electron affinity. why is Chlorine higher than Fluorine?

Question

I know that halogens have the highest electron affinity values but why is Chlorine the highest ?

Answer 1

Chlorine is further down on the column in the periodic table. Chlorine has a larger electron cloud than Fluorine.

Answer 2

the electronic configuration of fluorine is 1s2 2s2 2p5 for this reason it has no such d subshell that chlorine contains so its eletron density is higher now if it accepts one electron therefore electron electron repulsion would be higher,where as on the other hand chlorine has an electronic con figuration 1s2 2s2 2p6 3s2 3p5 and the 3d subshell is empty so it has a capability to accommodate more electrons and the electron electron repulsion would be less compared to fluorine as a result of which more electrons would be accepted by chlorine for this reason chlorine has more electron affinity than fluorine. NOW FROM THOSE PREVIOUS EXPLANATIONS MY QUESTION IS THAT IF IT DEPENDS ON SIZE OF FLUORINE THEN BROMINE AS WELL AS IODINE HAS A LARGER SIZE THAN FLUORINE THEN WHY THEY DON'T HAVE AN ELECTRON AFFINITY MORE THAN THAT OF FLUORINE? FROM :MEGHAMITRA DUTTA