1.

No two electrons of the same atom can have saset of quantum numbers. This is(1) Pauli's exclusion principle(2) Uncertainty principle(3) Hund's rule(4) Aufbau principle.

Answer»

The Pauli Exclusion Principle states that, in an atom or molecule, no two electrons can have the same four electronic quantum numbers. As an orbital can contain a maximum of only two electrons, the two electrons must have opposing spins.(1) option is correct



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