If electrons don't circle the nucleus, it has no momentum, it will fall in. ...

Totally wrong. You keep using Newtonian mechanics to explain things in quantum mechanics. You can't do that. Quantum mechanics is a more fundamental theory and from that you can derive Newtonian mechanics and

predictions. You're trying to do it the opposite way.

You have an incredible amount of physics to learn before you tackle quantum mechanics but you're not willing to do that work. That's why you don't understand quantum mechanics and never will - until you do the basic work, from the ground up. I had to spend years learning algebra, trigonometry, calculus, vector analysis, mathematical physics, Newtonian Mechanics, Relativity, etc etc etc. It was

then that I was prepared to learn quantum mechanics. You arrogantly think you can skip everything before quantum mechanics before you learn quantum mechanics.

The way you think it'll never happen.