The Development of Atomic Models

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The Development of Atomic Models

• GOAL You will create an interactive timeline
  using PowerPoint that you will present to the
  class.
• The timeline should demonstrate at least 10
  events explaining the development of the Atomic
  Model.
• Each event should have an image, video, or sound
  clip.
• To create this timeline you should use your
  textbook and the Internet.

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The Development of Atomic Models Example
1897
1803
John Dalton pictures atoms as tiny,
indestructible particles, with no internal
structure.
J.J. Thomson, a British scientist, discovers the
electron. The later leads to his "plumpudding
model. He pictures electrons embedded in a sphere
of positive electrical charge.
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Bohr Model In Niels Bohr's model, the electrons
move in circular orbits at fixed distances from
the nucleus.
1913
1911
New Zealand physicist Ernest Rutherford finds
that an atom has a small, dense, positively
charged nucleus. Electrons move around the
nucleus.
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Electron Cloud Model Erwin Schrödinger develops
mathematical equations to describe the motion of
electrons in atoms. His work leads to the
electron cloud model.
1926