write the main postulate of Dalton's atomic theory
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A theory of chemical combination, first stated by John Dalton in 1803. It involves the following postulates: (1) Elements consist of indivisible small particles (atoms). (2) All atoms of the same element are identical; different elements have different types of atom. (3) Atoms can neither be created nor destroyed.
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All matter consists of indivisible particles called atoms.
Atoms of the same element are similar in shape and mass but differ from the atoms of other elements.
Atoms cannot be created or destroyed.
Atoms of different elements may combine in fixed, simple, whole-number ratios to form compound atoms.
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