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# Stationary waves being used to describe how electrons behave within atoms watch

1. Can anyone explain to me how stationary waves can be used to describe how electrons behave within atoms. I know i've been taught it but can't remember and can't find it in any books. Before tommorrow (exam) would be great!

2. please!!! surely someone knows!!
3. no1, at all knows? please...
4. stable electron orbits only exist where a whole number of electron wavelengths fit into the circumference of the orbit and form a stationary wave which does not radiate energy. in this model, the electrons have quantised angular momentum and energy can only be emitted and absorbed in discrete amounts.
5. thanks a lot!
this explains shells etc!
so i take it electron wavelengths = h/p
is this actually on A level syllabus? cant remember
cheers
6. yeah, wavelength = h/p. so for the allowed orbits:

n*wavelength =2*pi*r r=radius or orbit
nh/mv = 2*pi*r

mvr (angular momentum) = nh/2*pi*r so angular momentum is quantised.

i have no idea if this is on the a level syllabus, sorry.
7. ok well thank you so much, you're a great help!

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