[gctso]

How do I know which direction does the electron spin when I randomly choose an element to look at?
Take oxygen as an example, it has two upwards arrows when I draw out the electron orbital. Does an upwards arrow mean it is spinning in a certain direction?
Also, does the magnetic spin obeys the right hand grip rule in physics?

I have a test tomorrow, please reply ASAP. Thanks!

[Corribus]

Take oxygen as an example, it has two upwards arrows when I draw out the electron orbital. Does an upwards arrow mean it is spinning in a certain direction?

At the level you're likely at, the answer is basically no. What is important is pairing or not pairing of electron spins, not whether they are drawn "up" or "down".

Also, does the magnetic spin obeys the right hand grip rule in physics?

In what context?

[gctso]

In what context?
[/quote]

It is a method to find either the current or the magnetic field direction.

Here's a picture of it

link

[Corribus]

Yes, I know what it is. In what context, related to electron spin, are you wondering whether you would need to use it?

[gctso]

Using the magnetic field to find the direction spin. I think I used it wrong though, but I am not sure.

[Irlanur]

whether you draw the arrows up or down and how you call these states is usually just a matter of convention and also not very important. However, the gyromagnetic ratio has a sign, so the spins can have the same or opposite direction than the magnetic moment.

[gctso]

Oh now I see, thank you.