Spin Quantum Number

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Sana_Mian_3G
Posts: 30
Joined: Fri Sep 28, 2018 12:23 am

Spin Quantum Number

Postby Sana_Mian_3G » Fri Nov 02, 2018 10:27 am

How do you know if a quantum number is 1/2 or -1/2?
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Iris Bai 2K
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am

Re: Spin Quantum Number

Postby Iris Bai 2K » Fri Nov 02, 2018 10:31 am

If it's the first electron to go in that orbital, the spin number is -1/2. If it's the second electron to go in that orbital, the spin number is +1/2. More simply, if the atom is in the first half of the block it's in, the electron will have a spin number of -1/2, and vice versa.
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