Subatomic particles don’t weigh much. The mass of a proton (basically the nucleus of a hydrogen atom) is a mere 1.672gained by one electron as it’s accelerated through one volt. In these units, the proton has a mass of 938,272,081 electron volts, or about 938 megaelectron volts (MeV). The electron weighs in at 511 kiloelectron volts (keV).
