explain pauli's exclusion principle

Pauli Exclusion Principle

  • No two electrons in an atom can have the same set of all the four quantum numbers.

  • Two electrons can have the same value of three quantum numbers n, l, and me, but must have the opposite spin quantum number (s).

  • The maximum number of electrons in the shell with the principal quantum number n is equal to 2n2.

For example

In an orbital diagram, an electron is represented by an up arrow (↑) indicating a positive spin, or a down arrow (↓) indicating a negative spin.

And it can not be represented by both the arrows on the same side.


 

 

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It states that the no two electrons can have all the four quantum numbers identical .

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