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Question
According to Dalton’s Atomic Theory, atoms of the same element are identical in all respects. But according to the Modern Atomic Theory, this postulate is proved wrong. Explain.
Solution
According to modern atomic theory atoms of the same element may not be alike in all respect.
e.g. isotopes of chlorine 3517 Cl and 3717 Cl have different atomic masses 35 and 37. This proves Dalton’s Atomic Theory wrong.
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