Explain the mutual exclusion principle.

In an atom or a molecule two electrons can not have the same parameters. Example in an atom , the electrons are in orbital characterized by 4 parameters 3 quantum numbers n, l, m characterizing the orbital and one the spin which is +1/2 or-1/2 depending on the sense of rotation on the electron about its axis.The exclusion principle states that given 2 electrons ,they can not share all 4 same quantic numbers

Mutual Exclusion principle is the same as Pauli's exclusion principle.

It states that an atom cannot have the same set of quantum numbers in its electronic configuration.

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