-
He theorized that all material bodies comprise indivisibly small “atoms.” -
based on the concept that each element consists of its own unique brand of indivisible atom -
discovery that atoms were made up of smaller components -
Rutherford established that the mass of the atom is concentrated in its nucleus -
proposed a model of the atom in which the electron was able to occupy only certain orbits around the nucleus -
discovery of the neutron in the atom