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Selasa, 29 Mei 2012

ATOMS

 DALTON'S ATOMIC THEORY
1.Elements are composed of extremely small particles called atoms. 
2.All atoms of a given element are identical, having the same size, mass and chemical properties.  The atoms of one element are different from the atoms of all other elements.
3.Compounds are composed of atoms of more than one element. In any compound, the ratio of the numbers of atoms of any two of the elements present is either an integer or a simple fraction.
4.A chemical reaction involves only the separation, combination, or rearrangement of atoms; it does not result in their creation or destruction.

  

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