Atom

Foundations of the Atom

By emilyLwollenberg
  • 300

    around 300 B.C. Aristotle attempted to prove that all matter was made from the four elements

    around 300 B.C. Aristotle attempted to prove that all matter was made from the four elements
    This caused Democritus' theory to be over looked for 2,000 years
  • 460

    460 B.C the Greek philosopher, Democritus, develops the idea of atoms.

    460 B.C the Greek philosopher, Democritus, develops the idea of atoms.

  • Antoine Lavoisier's experiments and discovery led to his theory of the Law of Conservation of Mass

    Antoine Lavoisier's experiments and discovery led to his theory of the Law of Conservation of Mass
    Much of his experiments led to the atomic theory.

  • Joseph Proust proposed the the Law of Definite Proportions

    Joseph Proust proposed the the Law of Definite Proportions
    These law stated that in any given chemical compound, the elements always combine in the same proportion with each other.

  • John Dalton discovers the atom

    John Dalton discovers the atom

  • John Dalton discovers the Law of Multiple Proportions

    John Dalton discovers the Law of Multiple Proportions

  • John Dalton writes "A New System of Chemical Philosophy"

    John Dalton writes "A New System of Chemical Philosophy"

  • J. J. Thomson's discovery of the electron.

    J. J. Thomson's discovery of the electron.

  • Niels Bohr refined the nuclear model

    Niels Bohr refined the nuclear model

  • Ernest Rutherford proposes the nuclear model of the atom

    Ernest Rutherford proposes the nuclear model of the atom

  • James Chadwick discovered the nuetron

    James Chadwick discovered the nuetron

  • contemporary theories led the the Modern Atomic Theory

    contemporary theories led the the Modern Atomic Theory