Hey everyone, I'm a brazilian researcher and I'm having quite a problem in order to find some information. I was wondering if any of you could help me out.
My question is: Why does an atom, in the gas state, releases energy when an electron is added to it's eletrosphere? I founded lots of explanation on internet but none of them were clear enough for me to understand. I mean, all I founded were people saying that the energy release occur due to the atom reaching a more stable state. But why is that so?
I also read that the stress of the electrons cause this energy release, but it wasn't explaining exactly how does this event works.
In fact, I'm looking for a answers that will explain this to me. I'd be really glad if someone could solve my doubts or even suggest any book or article that will help me out.