spins

[Sophia Dinh 1D]

How do you know if the spin is up or down?

[005391550]

+1/2 is spin up and +1/2 is spin down

[Adam Kramer 1A]

You can tell in situations like when Dr. Lavelle was writing out the quantum numbers and shells and he wrote out lines above the subshells with arrows pointing up or down to fill the subshell. First all the electrons will fill in spinnning up and then they will fill in spinning down when denoted in the way LAvelle did.

[Sarah Nichols 4C]

The quantum number m sub s denotes the spin of the electron: +1/2 is 'spin up' and -1/2 is 'spin down'

[DMuth_1J]

It isn't something you have to worry about too much. You're not going to have to calculate or find the direction of spin, just know that in the same orbital two electrons cannot have the same direction spin.