Electron Spin

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Electron Spin

Postby WUng_1D » Sun Oct 20, 2019 10:28 pm

When drawing the arrows for the orbitals, why do we have the draw the arrows going up first and then the arrows going down after

Alfred Barrion 2H
Posts: 100
Joined: Sat Jul 20, 2019 12:16 am

Re: Electron Spin

Postby Alfred Barrion 2H » Sun Oct 20, 2019 10:32 pm

We draw arrows going up first because each electron must enter an empty orbital first before going into the same orbital because of repulsion (two electrons repel). By putting the arrows up before down, it shows how we can minimize repulsion in a specific element.

Ryan 1K
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Joined: Fri Aug 09, 2019 12:15 am

Re: Electron Spin

Postby Ryan 1K » Sun Oct 20, 2019 10:32 pm

The arrows are different directions to indicate the opposite electron spins. Although the electrons aren't actually spinning up and down, we can indicate their spins with up and down arrows. As to why we write the up arrow before the down arrow, I believe it is arbitrary seeing as how the direction of the arrows is arbitrary as well (up and down don't refer to the actual directions).

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