Atomic model timeline

By Alex patrick hennon
  • 500 BCE

    the Alchemists

    the Alchemists
    The theory was that all metals were made out of mercury and Sulfur and it might be possible to change base metals into gold.
  • 427 BCE

    plato

    plato
    plato was the one that introduced the atomic theory. in which ideal geometric forms of atoms which atoms break into triangles.
  • 400 BCE

    Democrtus

    Democrtus
    this theory had everything that had atoms which are physically but their not geometrically invisible.
  • 322 BCE

    Aristotle

    Aristotle
    Aristotle did not beileve in the atomic theory, He thought that everything was made out of the four elements.

  • Robert Boyle

    Robert Boyle
    in boyles law it was stated that if the volume of a gas is decreased, the pressure increases..

  • lavoisier

    lavoisier
    Lavoisier work was the first breakthrough in the study of chemical reactions

  • john Dalton

    john Dalton
    Dalton said that al matter was composed of atoms witch are both invisible and indestructible building blocks. And different elements had atoms of differing size and mass.

  • Dmitri Mendeleev

    Dmitri Mendeleev
    Mendeleev on the periodic law and creation of the first periodic table.

  • Dmitri Mendeleev

    Dmitri Mendeleev
    Dmitri Mendeleev was the one who wrote the symbols for the chemical elements, putting them in order from their weight and last but not least, inventing the periodic table.

  • J.J Thomson

    J.J Thomson
    Thomson was a English physicist who helped the knowledge of atomics with his discovery of the electron.

  • the curies

    the curies
    The couple of Pierre curie and Marie curie discovered the radioactive elements polonium and radium. Marie called it radioactivity making rays by certain atoms.

  • Albert Einstein

    Albert Einstein
    Einstein proved that atoms existed and due to this, helped revolutionize. all sciences with statistics and probability.

  • Ernest Heisenberg

    Ernest Heisenberg
    Ernest discovered that the atom is mostly a empty space. And almost all of its mass are condustes into a small nucleus

  • Robert millkan

    Robert millkan
    Roberts theory was that electricty was conveyed by a miniscule unit electron gained acceptance to it. and by 1910, Robert theory was success.

  • Neils Bohr

    Neils Bohr
    Bohr made a theory for the hydrogen atom based on quantum theory. witch made the energy transferred only in certain quantities .

  • Henry Moseley

    Henry Moseley
    Mosely had a paper witch he said there were three unkown elements between aluminum and gold (heoever they were four)

  • werner Heisenberg

    werner Heisenberg
    Werner helped the atomic theory by formulating quantum mechanics when it came to matrices and in discovering the uncertainly principle and the Electron cloud model.