The History of the Atomic Theory By JanaFayyad 340 Aristotle Atomic Theory 460 Democritus Atomic Theory Oct 30, 1803 John Dalton Atomic Theory Oct 30, 1897 JJ Thomson Oct 30, 1898 Ernest Rutherford Oct 30, 1900 Max Planck Oct 30, 1903 Marie Curie Oct 30, 1908 Robert Millikan Oct 30, 1913 H Mosely Oct 30, 1913 Neils Bohr Oct 30, 1925 Werner Heisenberg Oct 30, 1931 J. Chadwick