Weblecture
The experiments of physics and their results can be described in the language of daily life. Thus if the physicist did not demand a theory to explain his results and could be content, say, with a description of the lines appearing on photographic plates, everything would be simple and there would be no need of an epistemological discussion. Difficulties arise only in the attempt to classify and synthesize the results, to estable the relation of cause and effect between them — in short, to construct a theory.
Werner Heisenberg — The Physical Principles of the Quantum Theory
In the meantime, check out the Scholars Online Chemistry Course lecture on the Bohr atom.
Here's another view of the basics of quantum mechanics, at Todd Stedl's Introduction to Quantum Mechanics Site.
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