Question

Geeta got a doubt, “Why does atomic nucleus contain proton and neutrons? Why can’t electrons and neutrons be in it”. Can you help to clarify her doubt? Explain.

Answer 1

Nucleus contains protons and neutrons inside it but not electrons and neutrons. If it would have happen, then 

1.  the alpha particles in the Rutherford’s alpha particle scattering experiment would have not been deflected or scattered. 
2.  the idea of nucleus would have not been evolved because the mass of electron is negligible, it is most unstable.