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  • Atomic Theory History
  • The Greek Model -Discovered by Democritus -He Concluded that matter can not by broken down infinitely  -The smallest piece of matter was named "atomos"
  • -All elements are made of invisible particles -Atoms of the same element are the same and vice versa -Compounds are formed by joining 2 or more elements
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  • The Dalton Model
  •  This model shows that there are things inside the atom. The white circles are negative electrons inside a 'soup' of positive electrons.
  • Plum Pudding Model J.J Thomson
  • Planetary Model of the Atom
  • Made by Rutherford Shows that negatively charged electrons orbit a very dense positively charged core.
  • Created by Nier Bohr Solves the problems in Rutherford's model Electrons can only orbit the nucleus in specific orbits. Atoms only emit light at certain wavelengths or frequencies.
  • Bohr's Model of the atom
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