William Verwoerdt

  • 200

    440 BC - Democritus

    440 BC -  Democritus
  • 201

    382 BCE - Aristotle

    382 BCE - Aristotle
  • 1803 - John Dalton

    1803 - John Dalton
    Said atoms were small hard objects.
    - said all substances are made of atoms. Atoms are small particles that cannot be created, divided, or destroyed
    - Atoms of the same element are exactly the same, and atoms of different elements are different.
    - Atoms join with other atoms to make new substances
  • 1897 - J.J. Thompson

    1897 - J.J. Thompson
  • 20th Century - Schrodinger and Heisenberg

    20th Century - Schrodinger and Heisenberg
  • 1909 - Ernest Rutherford

    1909 - Ernest Rutherford
  • 1911 - Ernest Rutherford

    1911 -  Ernest Rutherford
  • 1913 - Niels Bohr

    1913 -  Niels Bohr