Can someone tell me what is electron shielding and what increases and decreases it and why?
Electron shielding is the result of electrons in lower energy levels absorbing the nuclear charge of the proton, which consequently means that electrons in higher energy levels will be at a further distance from the nucleus because the attraction to the nucleus has now been weakened. I liked this analogy I found on Student Room.co.uk: “When you are in a cinema watching a movie, let say there is a tall person in front of you, you can’t see much of the screen that is being blocked by this person. The person in front is shielding you from seeing the whole screen, which you would have if you sit closer to the front screen(i am assuming that the screen is relatively small, so you can see it all, of course it is not that true in real cinema seating plan).” [ http://www.thestudentroom.co.uk/showthre… ] Electron shielding increases down a group, because as you go down a group, the number of shells increase, t
