Each electron has a fixed energy value it cannot move from one enery level to another one without a form of energy being supplied.. It also has a fixed path around the nucleus... And each energy level has sublevels..
Electrons, protons and neutrons are all made up of smaller particles - quarks and antiquarks... Well its a good thing they do not collapse into the nucleus or else none of us nor anything would exist..
The neutron is what stops the electron from collapsing into the nucleus i believe if there was no centripical force...
Maybe its due to the bonding in molecules... the electron would be attracted to both the nuclei if there was only 2 atoms in a molecule in a covalent bond...
Or it could have to do with the atomic radii, shielding occurs when levels are filled which stops the electrons from being as attracted to the nucleus as the ones in the first shell would be...
I dont know why they dont collapse.. Its just given to us as fact that they have fixed paths.. So i guess if they have a fixed path they cannot move from it...
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