Why can't an electron reside inside the nucleus?

The electron can exist inside a nucleus. It just can't stay there every long as a free electron because it would have to radiate way its orbital energy, and it cannot do that because there is no stable energy level for it. read more

Diameter of the atomic nucleus is of the order of 10 -15 m The maximum uncertainty in the position of electron is 10 -15 m. read more

If electrons were inside nucleus then we can say there was no need of having a neutrons, rather only protons and electrons would reside together where they would sum up to give us a neutral atom (say a rigid neutral object). read more

Orbital electrons DO NOT EXIST inside the nucleus. Quantum physics tells us why. An electron exists inside an atom only when and where allowed by its energy. The quantum energy of an electron inside the atom forbids it from existing in it. Some say that the probability of an electron existing in a nucleus is zero. Some say no, it’s not. read more