Science Assignment

Science Assignment
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atoms

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  • Aristotle believed all matter is made of fire,water,air and earth.
  • Democritus concluded that matter cannot be destroyed, divided or created. Democritus also believed in empty space between atoms.
  • John Dalton proposed the atomic theory, and he agreed with Democritus on how matter can't be created,destroyed or divided
  • J.J Thomson used the cathode ray experiment. He discovered that the cathode ray bent towards a positively charged plate
  • Ernest Rutherford used the gold foil experiment. He shot a positive particle beam towards a piece of gold foil. Some of the particle beam bounced back.
  • James Chadwick discovered that the nucleus also contained neutrally charged neutrons.
  • Niels Bohr proposed that electrons move in a circular orbit. The electrons closer to the nucleus have more energy than the electrons farther away.
  • Erwin Schrodinger concluded that electrons don't move in paths but in waves.
  • . .
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