Maya,+Sam,+Avery,+Didi

media type="custom" key="16053668" media type="custom" key="16054340"media type="custom" key="16054428" The atomic theory of an atom has been a ongoing question for a very long time. It started way back in Greece in 460 B.C. A scientist named Democritus who believed that all matter was created from atoms. After him came John Dalton in 1803, and he helped prove Democritus's theory was correct. Next came J.J. Thomson in 1897 and he advanced the knowledge f the atom by discovering the electron. Then Rutherford helped establish the existence of the nucleus through several experiments.