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(A) The two major developments that led to the failure of Bohr's model and provided a more accurate description of atomic structure are:$(i)$ The dual

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Dual behaviour of matter and Heisenberg's uncertainty principle

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(A) The two major developments that led to the failure of Bohr's model and provided a more accurate description of atomic structure are:$(i)$ The dual behaviour of matter,proposed by de-Broglie,which states that all matter exhibits both wave-like and particle-like properties.$(ii)$ Heisenberg's uncertainty principle,which states that it is impossible to determine simultaneously both the exact position and the exact momentum of an electron.

Which two developments remove the drawbacks of Bohr's model?

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