Re: electron

patrick wrote: 
Ok so an electron small non composite elementary particle.
In the hydrogen atom in the ground state what happens with this electron.?

The atom is just sitting there not being meausured or observed.
1) Does the electron move in (an unkown) classical Newtonian/relativistic orbit.? and start a new orbit when measured/observed. 

No.


2) Or if its position could be measured does it just materialize at some position according to its wave function when a measurement is made ? 

Close, although your use of "materialize" is quite strange here.



Or other possibilities?

The probability distribution for the position of the electron is given by
the wavefunction. That's all we can say. Every attempt to picture this
with a "charge cloud" or something like that is merely that - a picture. Not reality. Such pictures can help one visualize the atom, but one shouldn't try to draw any conclusions about the behaviour of electrons or atoms from them.

I recommend "The strange world of QM" by Styer to you. He also discusses how one can picture a particle which obeys QM.


Bye,
Bjoern
.

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