Atomic Model Timeline

By kylie.maze
  • 500 BCE

    The Alchemists

    The Alchemists developed the theory that all metals are composed of mercury and sulfer and is possible to change base metals into gold.
  • 442 BCE

    Democritus

    Developed the atomic theory of the universe. His atomic theory anticipated the modern principles of the conservation of energy.
  • 428 BCE

    Plato

    Plato was so impressed with this discovery that he was convinced that atoms of matter must derive from these five fundamental solids.
  • 384 BCE

    Aristotle

    His theory was that mass of incomprehensible size everywhere, he called it "hyle"

  • Robert Boyle

    Robert Boyle is known as the "The Father of Chemistry" for his discovery that atoms must exist based on the relationship between pressure and volume of gas.

  • Lavoisier

    clarified the concept of an element as a simple substance that could not be broken down by any known method of chemical analysis.

  • John Dalton

    Dalton's most important Contribution
    to science was his theory that matter
    is composed of atoms of differing weights
    combine in simple ratios by weight.

  • Dmitri Mendeleev

    Created the first periodic table of elements. He said there are still more elements to be discovered that are to be added to the periodic table.

  • J.J. Thomson

    Known for discovering electrons, isotopes, and inventing the mass spectrometer

  • Robert Millikan

    Known for is accurate measurement of the charge of the electron

  • Henry G. J. Mosely

    Established the relationship between atomic number and the charge of the atomic nucleus.

  • The curies

    Pierre Curie and his wife Marie Curie said that radioactive materials cause atoms to break down.

  • Werner Heisenberg

    He calculated the behavor of
    electrons around the atom with
    uncertainty Principle.

  • Ernest Rutherford

    British physicist, who become a Nobel
    laureate for his pioneering work in nuclear
    Physics and for his theory of the structure
    the atom.

  • Albert Einstein

    Creator of the special and general theories of relativity and for his intelligent hypothesis concerning the particle nature of light.

  • Neils Bohr

    He made numerous contributions to our understandings of atoms structure and quantum mechanics.