The heaviest particle is ______? a) Electron b) Proton c) Positron d) Neutron e) Meson Share with your friends Share 0 Miraculous Shubham answered this ITS NEUTRON ... AS IT IS 0.18% HEAVIER THAN PROTON... 8 View Full Answer Parul Singh answered this neutron......may be 2 Pankaj Jahagirdar answered this Its neutron with no charge. -1 Kamesh Krishna answered this neutron 5 Shubham Tomar answered this proton -3 Shubham Tomar answered this neutron 1