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Unformatted text preview: have a spin like earth.
The experiment involves sending a beam of particles through a magnetic field
and observing their deflection. The results show that particles possess an angular
momentum analogous to a spinning object, but that takes only one of two values.
a +ve half spin or -ve half spin. 2 05-Sep-13 The Pauli exclusion principle
• Electrons behave as if they spin
as tiny magnets.
on an axis.
• According to the Pauli exclusion
principle, only electrons
spinning in opposite directions
(indicated by ↑ and ↓) can
occupy the same orbital within a
• A fourth quantum number, the
electron spin quantum number
ms, was established and
assigned possible values of
+1/2 and -1/2. by Pauli) recap:
size of the orbital-shell(n), shape of the orbital- subshell (l),
orientation of the orbital(ml), electron spin (ms). 3 of these can be identical
but the 4th cannot. The Pauli Exclusion Principle: No two electrons in an atom can
have the same set of four qu...
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