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Atoms and Molecules — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceAtoms and Molecules2 Marks
Question
Why definition of an atom given by Dalton is no longer valid?
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Answer

The statement of Dalton's theory that atoms are indivisible is not valid since now, under special circumstances, atoms can be further divided into still smaller particles called electrons, protons and neutrons.

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