We all know that electron revolves around protons and neutrons in the nucleus.. My question is why should electrons only revolve around the protons ? Why not protons revolve around electrons?
Answer: This is our observation and is the way nature is.
We know protons and neutrons are the heavier particles of atom and hence they constitute the nucleus and the lighter electrons revolve around them.
My point is, it’s not the charge, but the mass which determined which particles of the nucleus.
We can imagine antiprotons (-ve) and positrons to constitute atoms.
Whatever be the case, the most energetically favorable combination is allowed.