In the last lesson, we explored the Bohr model. It was a better model than the one before, that of Rutherford's planetary model, whic in turn was a better model than the Plum Pudding Model.
However, as discussed there were a number of limitations to the Bohr Model
However, as discussed there were a number of limitations to the Bohr Model
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The one which de Broglie sought to address was the limitation as to why electrons should have discrete energy levels.
De Broglie introduced a radical idea why electrons stay in set orbits. Watch the video |
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Demonstration
We can model de Broglie standing wave model with a simple apparatus. In this video I examine a useful demonstration to help understand the wavelike nature of the electron. |
Sample Problem
We are now ready to try a sample problem
Below is a sample problem with a video that explain how to solve it. It is suggested you try the problem beforehand, as this actually aids understanding, even if you are unsure if you are correct.
We are now ready to try a sample problem
Below is a sample problem with a video that explain how to solve it. It is suggested you try the problem beforehand, as this actually aids understanding, even if you are unsure if you are correct.
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Interactive
This animation looks that the standing waves that De Broglie hypothesised for the Bohr atom. By Tom Walsh
This animation looks that the standing waves that De Broglie hypothesised for the Bohr atom. By Tom Walsh
The experiment that demonstrated that electrons act like waved
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Of course de Broglie's solution was a hypothesis, and at the time of publication had no experimental evidence to support it.
A mere few years later Davisson and Germer designed an experiment that involved diffraction .....with electrons. |
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