Interesting.
At energies of a few hundred megaelectron volts (MeV; 106 eV), electrons inside the beam are little suffering from atomic electrons; instead, they penetrate the atom and they are scattered because of the positive nucleus. Therefore, whose atoms contain only single protons in their nuclei, the pattern of scattered electrons reveals the size of the proton, if such a beam is fired at liquid hydrogen. At energies more than a gigaelectron volt (GeV; 109 eV), the electrons penetrate with the protons and neutrons, and also their scattering patterns reveal an inner structure. neutrons, Thus and protons are eliminate indivisible than atoms are; indeed, they contain still smaller particles, which happen to be called quarks.