Spin Quantum Number

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Sophia Dinh 1D
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

Spin Quantum Number

Postby Sophia Dinh 1D » Mon Oct 21, 2019 5:39 pm

Why is the spin number important and what's the difference between up and down?

Adam Kramer 1A
Posts: 103
Joined: Sat Aug 24, 2019 12:15 am

Re: Spin Quantum Number

Postby Adam Kramer 1A » Mon Oct 21, 2019 5:57 pm

The spin number is the Pauli exclusion principle says you cannot have two of the same thing in the same orbital, so they must have opposing spin to counteract each other's magnetic forces. Up and down are the two different directions.

kim 2I
Posts: 105
Joined: Thu Jul 25, 2019 12:17 am

Re: Spin Quantum Number

Postby kim 2I » Mon Oct 21, 2019 8:06 pm

The spin magnetic quantum number is important because it describes the direction in which the electron spins. There are only two spin states that can be represented with an up or down arrow. A +1/2 is indicated with an up arrow, while -1/2 is indicated with a down arrow. The arrow pointing up can be thought as the electron spinning counterclockwise at a certain rate or clockwise at the same rate by the down arrow.

Abigail Sanders 1E
Posts: 112
Joined: Wed Sep 11, 2019 12:16 am

Re: Spin Quantum Number

Postby Abigail Sanders 1E » Mon Oct 21, 2019 10:20 pm

The spin number is important because it shows that there are two electrons in each orbital that are spinning in opposite directions to counteract the magnetic field. The numbers are important when filling to keep track of which electrons are in which orbitals as electrons fill in +1/2 first and then fill up each orbital again with -1/2. Thus, each orbital takes one upward spinning electron before they fill a -1/2 electron.

Eva Zhao 4I
Posts: 101
Joined: Sun Sep 29, 2019 12:16 am

Re: Spin Quantum Number

Postby Eva Zhao 4I » Thu Oct 24, 2019 5:04 pm

An important thing to note with the inclusion of the spin quantum number is that no two electrons in the same atom can have exactly the same four quantum numbers. The spins are indicated, as everyone said, by +1/2 or -1/2 since the electron can spin up or down.

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