## Electron Spin

$H_{\psi }=E_{\psi }$

1-D: $E_{TOTAL}\psi (x)=E_{k}\psi (x)+V(x)\psi(x)=-\frac{h^{2}}{8\pi ^{2}m}\frac{d^{2}\psi(x)}{dx^{2}}+V(x)\psi(x)$

EthanPham_1G
Posts: 104
Joined: Sat Jul 20, 2019 12:17 am

### Electron Spin

Can someone explain what the electron spin is? And what determines how/in what direction the electron spins?

AArmellini_1I
Posts: 107
Joined: Fri Aug 09, 2019 12:15 am

### Re: Electron Spin

Electron spin is just the direction in which the electron rotates (there are two options: up [+1/2] and down [-1/2]). You can almost think of an electron as the earth rotating around the sun, while the Earth rotates around the sun on its orbit in also rotates on its axis. As for what determines the variable, Lavelle emphasized that this variable does not relate to n, l, m(l). So I'd assume it's either random luck or a reason you aren't expected to know right now...

Rida Ismail 2E
Posts: 139
Joined: Sat Sep 07, 2019 12:16 am

### Re: Electron Spin

both electrons have the same amount of spin, it is just opposite. Dr. Lavelle did not address the reason why they spin, but you need to know that they do. And the evidence for the spin is shown in the Stern and Gerlach Experiment. Another key component is that in order for e- to pair up they have to have different spins. so why drawing e- configurations for each e- pair in the orbital you have to have one arrow facing up and one facing down.

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