Why Are Multiple Quantum Numbers Allowed in a Hydrogen Atom?

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yecko
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Homework Statement


http://i.imgur.com/GQ9Xk6d.png
GQ9Xk6d.png


Homework Equations


Quantum mechanical model of atomic structure

The Attempt at a Solution


Why all sets are allowed?
H atom only got one e- which only one orbital should be there, isn't it?
If there aren't second or more e- , no second orbital or higher number of orbital, how comes there is higher number of shells (principle n) ? Hence as do the the number of angular momentum (l) for subshell and magnetic (ml) for the variety of orientation?

I am a newbie to QM, who learned only Bohr's model in high school.
Thank you very much.
 
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Electron can get excited. You are thinking in terms of the the lowest energy level it can occupy - which is not a bad starting point, but it is not a whole story either. When it gets excited it can jump up to any orbital, described by any set of valid quantum numbers.
 
i see.
thank you very much