Chemistry Timeline By pjsmith97 Jan 1, 1662 Boyle's Law Robert Boyle proposes his theory Jan 1, 1787 Jacques Charles proposes Charles' Law Jan 1, 1797 Joseph Proust proposes law of definite proportions Jan 1, 1800 Alessandro Volta devises first chemical battery Jan 1, 1803 Joseph Dalton proposes Dalton's law Jan 1, 1808 J. Jakob Berzelius proposes chemical symbols Jan 1, 1811 Amedeo Avogrado proposes Avegrado's law Jan 1, 1815 William Prout proposes Prout's hypothesis Jan 1, 1825 Michael Faraday isolates benzene Jan 1, 1859 Foundatios of spectroscopy Jan 1, 1864 Meyer develops early version of periodic table Jan 1, 1883 Svante Arrhenius develops ion theory Jan 1, 1884 Le Chatelier's principle Jan 1, 1893 Werner discovers structures of cobalt complexes Jan 1, 1894 Ramsay discovers noble gases Jan 1, 1897 J. J. Thomas discovers electron Jan 1, 1900 Rutherford discovers source of radioactivity Jan 1, 1903 Tsvet invents chromatogoraphy Jan 1, 1905 Haber and Bosch develop Haber Process Jan 1, 1907 Baekeland invents bakelite Jan 1, 1909 pH concept Jan 1, 1912 X-ray crystallography established Jan 1, 1912 Concept of molecular dipole Jan 1, 1921 Quantum mechanical spin Jan 1, 1931 Urey discovers deuterium Jan 1, 1932 Chadwick discovers neutron Jan 1, 1938 Hahn discovers process of nuclear fission Jan 1, 1940 Neptunium identified Jan 1, 1962 Bartlett syntesizes xenon hexafluoroplatinate Jan 1, 1985 Discovery of fullerenes