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which part of bhor's theory has been proven wrong?
* The indivisibility of an atom was proved wrong, for, an atom can be further subdivided into protons, neutrons and electrons. [ However an atom is the smallest particle, which takes part in chemical reactions. * According to Dalton, the atoms of same element are similar in all respects. This is wrong because atoms of some elements vary in their mass and density. Such atoms of the same element having different masses are called isotopes. For example, chlorine has two isotopes having mass numbers 35 a.m.u and 37 a.m.u. * Dalton also said atoms of different elements are different
in all respects. This has been proved wrong in certain cases like argon and calcium atoms, which have the same atomic mass of 40. Such atoms of different elements that have the same atomic mass are called isobar. * According to Dalton atoms of different elements combine in simple whole number ratio to form compounds. This is not seen in complex organic compounds like sugar C12H22O11. * The theory completely fails to explain the existence of allotropes. The difference in properties of charcoal, graphite, diamond went unexplained in spite of being made up of same kind of atoms. source: chemistry.tutorvista.com/.../postulates-of-dalton-s-atomi... - United States ]
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Asked 3/1/2012 2:22:18 PM
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