History of the atomic modle

History of the atomic modle

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  • Democritus
  • Formulated the Atomic theory of the universe, circa 470-380 B.C.. Thaugt of the particles that make up the universe. the atomic modle is just a single part.
  • We are all made of tiny little particles!
  • Proposed Modern Atomic Theory, the theory of atoms, around 1803. The atomic modle is now thought of as a solid, invisible where of matter.
  • John Dolton
  • J. J. Tomson
  • Discovered and identified the electron in 1897. The model of the atom is a spherical cloud with electrons inside.
  • Ernest Rutherford
  • Father of Nuclear Physics. Formed theory of new atom form in 1909. The model is a nucleus with electrons orbiting around it.
  • Actually discovered that electron orbit around the atom in 1913. The model is now the nucleus (protons) with the electrons orbiting around.
  • Niels Bohr
  • Electron Cloud Model
  • There is a nucleus(red), then a ring of orbiting electrons(second circle) and then the cloud of electricity that the electrons create(outermost circle) engulfing the whole atom.
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