Chemistry Timeline #2 1800 s. Joseph Proust: The law of definite proportion (composition)
{"Image DocumentName": "Chemistry Timeline #21800 s. Joseph Proust: The law of definite proportion (composition)", "Image ImageDescription": "John Dalton: The Atomic Theory, The law of multiple proportions. Joseph Gay-Lussac: Combining volumes of gases, existence of diatomic molecules. Amadeo Avogadro: Molar volumes of gases. Jons Jakob Berzelius: Relative atomic masses, modern symbols for the elements. Dmitri Mendeleyev: The periodic table. J.J. Thomson: discovery of the electron. Henri Becquerel: Discovery of radioactivity s. Robert Millikan: Charge and mass of the electron. Ernest Rutherford: Existence of the nucleus, and its relative size. Meitner & Fermi: Sustained nuclear fission. Ernest Lawrence: The cyclotron and trans-uranium elements.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}