atomic model

By Tayler
  • 500 BCE

    The Alchemists

    The Alchemists
    They develop the theory that all metals are made of mercury and sulfur and that it is possible to change base metals into gold.
  • 442 BCE

    Democritus

    Democritus
    His atomic theory anticipated the modern principles of the conservation of energy and the irreducibility of matter.
  • 322 BCE

    Aristotle

    Aristotle
    Aristotle provided us with knowledge of natural science including Physics, which gives a vast amount of information on astronomy, meteorology, plants, and animals.
  • 5 BCE

    Plato

    Plato
    He said that matter was composed of small indivisible particles called atoms.

  • Robert Boyle

    Robert Boyle
    he discovered that atoms must exist based on the relationship between pressure and volume of gas.

  • Lavoisier

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

  • John Dalton

    John Dalton
    His contribution to science was his theory that matter is composed of atoms of differing weights and combine in simple ratios by weight.

  • Dmitri Mendeleev

    Dmitri Mendeleev
    developed the Periodic Law and created the periodic table of elements that is used today.

  • JJ Thomson

    JJ Thomson
    He discovered of the electron, the negatively charged particle in the atom. He is known for the Thomson atomic theory.

  • The curies

    The curies
    They stated that radioactive materials cause atoms to break down spontaneously, releasing radiation in the form of energy and subatomic particles.

  • Albert Einstein

    Albert Einstein
    Einstein was known as the creator of the special and general theories of relativity and for his intelligent hypothesis concerning the particle nature of light.

  • Robert Millikan

    Robert Millikan
    He created the oil drop experiment that measured an electrons charge.

  • Ernest Rutherford

    Ernest Rutherford
    He created the theory of the structure of the atom.

  • Henry G.J. Mosely

    Henry G.J. Mosely
    He called the place of an element in the list its atomic number. He concluded that it was the atomic number of the element, not the atomic weight, that decided what the element was.

  • Neils Bohr

    Neils Bohr
    He created the model of the atom in which the electron was able to occupy only certain orbits around the nucleus.

  • Werner Heisenberg

    Werner Heisenberg
    He calculated the behavior of the electrons around the atom with the Uncertainty Principle.