Respuesta :
Number three
They contain protons (positive), neutrons (negative), electrons (neutral) and all are in a nucleus which is part of an atom
They contain protons (positive), neutrons (negative), electrons (neutral) and all are in a nucleus which is part of an atom
it's number 2 I think. electrons, protons and neutrons. protons and neutrons in nucleus electrons outside. exception being "normal" hydrogen. one proton and one electron with no neutrons.