Explanation: Rutherford took a gold foil and passed a beam of alpha-particles (carrying positive charge) through it and then he recorded some observations.
He thought that the alpha-particles will pass straight through the foil but to his surprise, some of the particles deflected their path and few of them deflected backward.
He concluded that the atom must have something which is carrying the same charge as that of the alpha particles which made them deflected back.
He finally concluded that the atom consists of tiny, dense and positively charged centre which he later called as nucleus.
