![]() ![]() The law of conservation of mass states that the total mass present before a chemical reaction is the same as the total mass present after the chemical reaction. Atoms of different elements are different and have different masses. All atoms of the same element are alike and have the same mass. They cannot be divided into smaller particles, created, or destroyed. Scientists had now established that the atom was not indivisible as Dalton had believed, and due to the work of Thomson, Millikan, and others, the charge and mass of the. ![]() His book A New System of Chemical Philosophy (Part I, 1808 Part II, 1810) was the first application of atomic theory to chemistry. Dalton’s atomic theory consists of three basic ideas: All substances are made of atoms. Scientists did not account for the gases that play a critical role in this reaction. Atom - Dalton, Bohr, Rutherford: English chemist and physicist John Dalton extended Proust’s work and converted the atomic philosophy of the Greeks into a scientific theory between 18. ![]() \) shows that the burning of word does follow the law of conservation of mass. ![]()
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