Chemisty Timeline

  • Phosphorus

    Chemistry Phosphorus was found in 1669 in Germany by Hennig Brand.
  • Nickel

    Chemistry Nickel was found in 1751 in Sweden Axel Cronstedt.
  • John Dalton

    PB Kidz John Dalton thought atoms looked like solid spheres.
  • The Periodic Table

    The Periodic Table
    The Periodic TableChemical Elements Dmitri Mendeleev created the first periodic table in 1869.
  • Protons

    Chemistry HistoryProton Eugene Goldstein discovered a positive particle, which he called a proton.
  • Marie Curie

    Marie Curie
    Women's History Marie Curie discovered polonium and then radium.
  • J. J. Thomson

    Chemical Heritage FoundationWikibooks J. J. Thomson thought the atom was a positively charged sphere with negatively charged electrons on the outside.
  • Ernest Rutherford

    The Encyclopedia of Science Ernest Rutherford thought that in the positively charged atom was a tiny nucleus and that the electrons are on the outside.
  • Niels Bohr

    Wikipedia Niels Bohr thought the atom was a small positively charged nucleus surrounded by electrons that orbited around the nucleus.
  • Period: to