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  • Hindu philosophers discuss atoms as the ULTIMATE PIECES of the ELEMENTS. Symbol represents: Fire, Water, Earth, Air
  • Democritus proposed that atoms are eternally unchanging and are indivisible.
  • Lord Kelvin`s model is a vortex model of atom.
  • J.J Thomson proposed the plum pudding model of an atom which was picturing negatively charged electrons.
  • Niels Bohr`s model was a dense positive charged nucleus.
  • John Dalton proposed the modern atom. Here in the modern atom, electrons travel as clouds of electric charge.
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