Algodoo

Increase or decrease the number of electrons and the atom always remains stable, it supports up to 6 electrons in the first layer, I tried to reduce it to 2 as in real life, but the electron repulsion forces are so high that they destabilize everything.
Since it is impossible to simulate quantum physics with Newtonian physics, the only trick is that the electrons have their own propulsion, have an atmosphere thick so they do not leave their orbit, and each electron has a small sphere underneath them that is attracted to the nucleus, the outer shell of the nucleus repels the electron, the outermost part of the electron repels other electrons but not the nucleus, the difference in this simulation is that the electron shells are created naturally by the interaction of the forces, I used quadratic and linear gravity to create this atom, so there can only be one atomic nucleus in the system. Feel free to modify my project and post it, but let me know and give credit, please. My purpose is to put only two electrons at least in the first layer. I did not use any hidden programming tricks.