Cemistry By mrdragon59 Period: Jan 1, 1803 to Dec 31, 1803 John Dalton States Law of Multiple Proportions Period: Jan 1, 1897 to Dec 31, 1897 J.J. Thomson first suggests the electron Period: Jan 1, 1899 to Dec 31, 1899 Max Planck discovers Planck's constant Period: Jan 1, 1900 to Dec 31, 1900 Earnest Rutherford develops disintegration theory Period: Jan 1, 1908 to Dec 31, 1908 Ernest Rutherford recieves Nobel Prize Period: Jan 1, 1909 to Dec 31, 1909 Robert Millikan performs his oil drop experiment Period: Jan 1, 1909 to Dec 31, 1909 Ernest Rutherford conducts Gold Foil Experiment Period: Jan 1, 1918 to Dec 31, 1918 Max Planck recieves Nobel Prize Period: Jan 1, 1923 to Dec 31, 1923 Robert Millikan recieves Nobel Prize Period: Jan 1, 1927 to Dec 31, 1927 Werner Heisenberg dicovers Uncertainty Principle Period: Jan 1, 1928 to Dec 31, 1928 Werner Heisenberg publishes Physical Principles of Quantum Period: Jan 1, 1932 to Dec 31, 1932 Werner Heisenberg Recieves Nobel Prize Period: Jan 1, 1932 to Dec 31, 1932 James Chadwick Discovers Neutrons Period: Jan 1, 1933 to Dec 31, 1933 Erwin Schrodinger recieves Nobel Prize Period: Jan 1, 1935 to Dec 31, 1935 Erwin Schrodinger Conducts his cat experiment Period: Jan 1, 1943 to Dec 31, 1946 James Chadwick helps create the Atomic Bomb