Chemistry Timeline

  • Death of Alchemy

    Death of Alchemy
    LinkThe disroving of Aristotle's four-elements theory.
  • Period: to

    Disproving of the Phlogiston Theory

    Link Antoine Lavoisier who disproved the Phlogiston Theory. He renamed the "dephlogisticated air" oxygen when he realized that the oxygen was the part of air that combines with substances as they burn
  • Datlons Theroy

    Datlons Theroy
    LinkJohn Dalton publishes his Atomic Theory
  • First Vacuum

    LinkHeinrich Geissler creates the first vacuum tube.
  • The Discovery of The Proton

    LinkEugene Goldstein discovered positive particles
  • Discovery of X-Rays

    LinkWilhelm Roentgen accidentally discovered x-rays
  • Raidoactive elements

    Raidoactive elements
    LinkMarie Curie discovered uranium and thorium within pitchblend
  • Joseph John Thomson

    Joseph John Thomson
    British physicist Joseph Thomson discovered the electron. [Link](<a href=''s.htm)' >Link</a>
  • Ernest Rutherfords atomic theroy

    LinkErnest Rutherford publishes his atomic theory describing the atom as having a central positive nucleus surrounded by negative orbiting electrons.
  • Bohr Atomic

    Bohr Atomic
    LinkIn 1913 Bohr proposed his quantized shell model of the atom to explain how electrons can have stable orbits around the nucleus.