How will the number of neutrons in an atom impact its stability?

There are 3 different charges in an atom; proton, electron, and neutron. protons are positively charged, electrons are negatively charged and neurons are when the atom has the same amount of protons and electrons in them, so 50 protons and 50 electrons in an atoms means that the atom is neutral. neutrons are created in a neutral atom, but when an electron leaves or enters a neutral atom, then its less stable.