why are group 2 and 15 exceptions of Electron affinity?
Answers
Explanation:
in general electron affinity increases from left to right across a period this is due to increasing effective nuclear charge which more medically who is this new electrons in in general electron affinity decreases from top to bottom down a group this change is not as dash as we see across a period however this is due to balance between increasing atomic radii and in decreasing electron electron repulsion as we move down a group the this river because the valence shells are larger as atomic radius increases the electron in this valency is do not have to be close to one another and so they do not experience electron electron repulsion is as much so electrons nucleus attraction is counterbalance by lower electron electron repulsion