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Atomic theory was devised by

  • A.John Dalton
  • B.Daimler
  • C.Mosley
  • D.None of these

Answer: A

John Dalton devised it.

His atomic theory of 1808 held that elements consist of indivisible atoms, that all atoms of an element are identical in mass, and that compounds form in fixed whole-number ratios - which explained the laws of conservation of mass and of definite and multiple proportions at once.

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