A typical electron in a piece of metallic sodium has
Chapter 40, Problem 40.69(choose chapter or problem)
A typical electron in a piece of metallic sodium has energy -E0 compared to a free electron, where E0 is the 2.7 eV work function of sodium. a. At what distance beyond the surface of the metal is the electrons probability density 10% of its value at the surface? b. How does this distance compare to the size of an atom?
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