Stern and Gerlach performed an experiment that showed the space quantization of silver atoms in an inhomogeneous magnetic field. Their experiment demonstrated that

a. space quantization is a property that only exists for energy levels, governed by quantum number n.
b.the number of ml states was even, not governed by the factor (2l + 1) as thought previously.
c. the differences in magnetic moment of the atom demonstrated space quantization in external magnetic fields.
d.the classically defined Bohr magneton was inaccurate because it did not take into account the space quantization of external magnetic fields within the atom.
e.an additional angular momentum factor within the atom was causing the observed space quantization.

e.
The splitting of their particle beam into only two different paths did not match what was theoretically supposed to be three paths due to space quantization of magnetic quantum number. They supposed that something else was causing that effect, and the intrinsic spin of the electron turned out to explain it.

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