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State the Various Postulates of Dalton’S Atomic Theory of Matter. - Science


State the various postulates of Dalton’s atomic theory of matter.

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Postulates of Dalton's atomic theory of matter :

  • Matter comprises very small particles called atoms.
  • Atoms of different elements differ in mass, size and chemical properties.
  • Atoms can neither be created nor destroyed.
  • Chemical reactions involve the combination, separation or rearrangement of atoms to form molecules or compounds.
  • Atoms cannot be divided.
  • A compound has a fixed number and kind of atoms.
  • Atoms of the same element can combine in more than one ratio to form more than one compound.
  • All the atoms in an element are identical in every aspect i.e. they have same mass, size and chemical properties.
  • Like elements, there are many kinds of atoms.
  • Atoms of different elements join together to form molecules of the compound in a chemical combination.
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Lakhmir Singh Class 9 Chemistry - Science Part 2
Chapter 3 Atoms and Molecules
Long Answers | Q 53.1 | Page 130
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