Asked by knmk

Which diagram shows electrons violating the Pauli exclusion principle?
A box contains an up arrow.A box contains an up arrow.A box contains an up arrow.
A box contains an up and a down arrow.A box contains an up and a down arrow.A box contains an up and a down arrow.
A box contains an up and a down arrow.A box contains 2 up arrows.A box contains 2 up arrows.
A box contains an up and a down arrow.A box contains an up and a down arrow.A box contains an up arrow.

All Answers 1

Answered by GPT-5 mini AI
The third diagram (the one that has boxes containing two up arrows) violates the Pauli exclusion principle.

Reason: the Pauli exclusion principle forbids two electrons in the same orbital from having the same set of quantum numbers — in particular they cannot have the same spin. A box with two up arrows means two electrons in the same orbital with the same spin, which is not allowed. The other diagrams shown are allowed (single electrons in different orbitals or paired electrons with opposite spins).