Most difficult part of the material
Primarrily understanding why the reduced mass is used for an electron. The book says "it is not difficult to show that in such a planetary like system the electron moves relative to the nucleus as though the nucleus were fixed and the mass m of the electron were slightly reduced" (pg 105)
I still do not completely understand the 'series limit' in the atomic spectra section, however will review it again soon.
Most interesting part of the material
The Bohr model seemed much more complicated than when I first studied it, however on closer inspection it appears the book just words it in such a way that I found difficult to understand. The extra detail regarding the Lyman, Balmer and Paschen series was valuable and I coped with this section quite easily.
After doing some chemistry previously, I found the the Atomic Spectra section the most interesting, particularly regarding spectroscopy. Would like to know more about its uses. Bohrs postulates were easily explained and found it interesting how they mix classical physics with non-classical (such as the quantisation of angular momentum).
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