Atom history

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Chemistry

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  • All things are made up of something called atoms. The atoms cannot be separated no matter what. The atoms can vary in size 
  • Democritus (A greek Philosopher) Theroised Around 490BC
  • Discovered the electron, leading to his 'plum-pudding' model. He pictured electrons embedded in a sphere of positive electric charge.
  • J.J. Thomson a British scientist 1897
  • Suggested that an atom has a central nucleus. Electron move in orbits like the rings around saturn
  • Hantaro Nagaoka a Japanese Physicist 1904
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