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Postby Ahmet_Dikyurt_3L » Wed Oct 24, 2018 12:23 pm

Can someone explain spin ups and downs? And how they’re represented?

Kailey Nichols 4B
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Re: Spins

Postby Kailey Nichols 4B » Wed Oct 24, 2018 1:13 pm

Spin up and spin down is just a way to describe the electron's angular momentum (it does not mean that the electrons actually spin in place). Spin up corresponds to an ms value of 1/2 and spin down corresponds -1/2. The spin values won't be written directly in the electron configuration notation, however if you're given something like 1s^2 2s^2 2px^1 2py^1 then we know that the last two electrons are parallel and thus both spin up.

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Re: Spins

Postby marisaimbroane1J » Wed Oct 24, 2018 2:38 pm

The spin values can also help determine electron configurations because of the rules discussed in class. It's important to always fill the subshell with one spin first then add the other spin when you fill the shell.

Searra Harding 4I
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Re: Spins

Postby Searra Harding 4I » Wed Oct 24, 2018 6:55 pm

When drawing electron configuration models, another thing to remember is that the electrons are parallel first. This means that there will be an upward arrow in each line drawn before you start pairing them with downward facing arrows.

Sophie Roberts 1E
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Re: Spins

Postby Sophie Roberts 1E » Thu Oct 25, 2018 9:00 am

In addition to the all the previous replies, spin up and spin down is referenced when an atom has unpaired electrons (it subshells aren't filled).

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