Question

Discovery of isotopes and isobars is the failure of??​

Answer 1

Answer:

According to Dalton's atomic theory, atoms of same elements are identical in all respects whereas atoms of different elements are different in all respects. But the discovery of isotopes revealed that atoms of the same element can have different mass. Discovery of isobars contradict the above two postulates of Dalton's atomic theory.

Answer 2

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