pauli exclusion

[Dakota_Campbell_1C]

What is the explanation behind the Pauli exclusion principle?

[Brian Chhoy 4I]

It basically means that there can only be two electrons in each orbital (state). For example, when drawing an aufbau diagram, in each orbital there are only two electrons, the one that spins up and the one that spins down.

[pamcoronel1H]

It is basically saying 2 things:

One is that in any orbital, no more than 2 electrons can be held at that orbital.

The second thing is that if there are 2 electrons in the same orbital, they HAVE to have paired spins, i.e. one is spinning in a clockwise direction and the other in a counterclockwise direction. This is usually indicated by up and down arrows as we have seen with the electron configuration examples.

With these two rules, it follows that no 2 electrons can have the same quantum numbers, because they each occupy an orbital that they share with only one another electron, and also have a unique spin.

[Aidan Ryan 1B]

About naming electrons... How do we label individual e- in d orbital that are the 1st or last when doing e-(y), e-(x), e-(z) as in the p orbital. Does it go v, w, x, y, z or does it work differently?