History of the Atom by Mrs. Harvey By ncharvey 450 Democritus fds Feb 12, 1803 Dalton Smaller particles make up substances Feb 12, 1897 Thomson Discuvered charges exist Feb 12, 1912 Rutherford Discovered the nulceus Feb 12, 1913 Bohr Discovered energy levels. Thought they existed like planets orbit the Earth. Feb 12, 1930 Schrodinger Found that electrons travel like waves
