Rutherford’s Experiment Discoverer In 1911 Rutherford experimented to know about arrangements of sub-atomic particles such as electrons and protons in an atom. Rutherford’s Gold Foil Experiment First of all, Rutherford took a gold foil of about 4×10-5cm and bombarded alpha particles on it. Alpha particles are helium nuclei with two protons and two neutrons presentWhat were the observations of Rutherford’s experiment?