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Wave Nature of Matter. De Broglie Wavelength. Wave-particle duality apply also to matter. Early Models of Atoms. Thomson’s Model. Rutherford’s Model. Atomic Spectra. The Rutherford model, as it stood, was unable to explain why atoms emit line spectra. The Bohr Model.
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The Rutherford model, as it stood, was unable to explain why atoms emit line spectra.
Bohr’s First Postulate The angular momentum of electron is quantized.
Bohr’s Second Postulate An electron doesn’t radiate when it is in one of the allowed orbits (stationary state).
Bohr’s Third Postulate A single photon is emitted whenever an electron jumps down from one orbit to another.