Spin Direction  [ENDORSED]

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Bryan Jiang 1F
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Joined: Fri Apr 06, 2018 11:03 am

Spin Direction

Postby Bryan Jiang 1F » Sun Apr 29, 2018 11:36 pm

When we draw out an electron diagram, we indicate the first electrons in orbitals with the up arrow first. Does this imply that all electrons prefer to spin one way (the up arrow spin, counterclockwise) when occupying an orbital by itself?

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Re: Spin Direction  [ENDORSED]

Postby Chem_Mod » Mon Apr 30, 2018 3:10 pm

When we denote two electrons as up spin and down spin, we are just referring to the fact that these two electrons have different spins, but we actually cannot know for sure which electron is spinning in what direction. Think of the spin as a "name" we give to the electrons.

Madison Hacker 1L
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Re: Spin Direction

Postby Madison Hacker 1L » Sun May 06, 2018 6:01 pm

We say spin up first when drawing the orbitals, but in reality it is not always the case that it is spin up.

Alexander Hari 1L
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Re: Spin Direction

Postby Alexander Hari 1L » Sun May 06, 2018 7:27 pm

They have no preference themselves to spin up or spin down, we just simply tend to write arrows pointing upwards to save time and for consistency. Although when two electrons occupy a single orbital, one must spin up while the other spins down.

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Re: Spin Direction

Postby Kailie_Giebink_1E » Thu Jun 14, 2018 1:37 pm

do we always need to draw the spin?

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