Hi, I am a student currently engaged in AP Physics B and AP Physics C, and I am curious as to why it is that most of the Noble Gases exhibit and exist in such a stable state. In AP Chem last year I learned that having a configuration in which the valence shell of an atom has eight electrons leads to a very electrically neutral and stable atom. I like to apply the knowledge I learn in physics to other fields, so I was just interested as to WHY the octet configuration is extremely stable. I asked my physics teacher, and he said it had something to do with conservation of angular momentum, so if anyone can elaborate on this I would appreciate it. PS I have looked this up in various textbooks but I have not gained the information I wish to obtain.