Hydrogen Atom -> Uncertainty Principle

[btbam91]

Hydrogen Atom ---> Uncertainty Principle

Hey guys, I'm having some trouble with this one.

[PLAIN]http://img849.imageshack.us/img849/2039/physhw.jpg

How do I get started?

 

[HallsofIvy]

A good start would be stating exactly what the uncertainty principle says.

 

[btbam91]

<x>*<p> = hcross/2

where <x> = R

so <p> = hcross/2R?