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Quantum Numbers

Posted: Mon Nov 04, 2019 1:09 am
by 205389184
I am having a bit trouble understanding the concept behind the quantum number ms. How do we determine this value?

Re: Quantum Numbers

Posted: Mon Nov 04, 2019 7:46 am
by christabellej 1F
The quantum number ms is the magnetic spin of the electron. In the Pauli Exclusion principle, it states that there can only be a maximum of two electrons per orbital, and that the two electron spins must be paired. That basically means that one electron will spin in an upwards direction and one in a downwards direction. The magnetic spin quantum represents that, with +1/2 representing the upwards spin and the -1/2 representing the downwards spin. This value can only be +1/2 and -1/2.

Re: Quantum Numbers

Posted: Mon Nov 04, 2019 9:08 am
by Emily Chirila 2E
I think that all you need to know is that the quantum number ms is only valid if its value is + or - 1/2 and that it refers to the spin of the electron, with the 2 electrons in an orbital having opposite spins (one has +1/2 one has -1/2).

Re: Quantum Numbers

Posted: Fri Nov 08, 2019 12:23 pm
by Eva Zhao 4I
ms is usually pretty arbitrary unless the question specifies that the electron is +1/2 or -1/2. The most important thing to remember is that no two electrons in an atom can have the exact same four quantum numbers, so if one electron is +1/2, the other in the pair is -1/2.

Re: Quantum Numbers

Posted: Fri Nov 08, 2019 12:26 pm
by ThomasNguyen_Dis1H
ms can only have the value of +/- 1/2. When drawing the electron configurations with arrows pointing up and down, you can see that each orbital can only have 2 arrows, one pointing up and one pointing down. This represents ms. One electron can have the value of 1/2 while the other electron has the value of -1/2 (down)

Re: Quantum Numbers

Posted: Sun Nov 10, 2019 6:21 pm
by Varadhan_3G
Are there any equations that use ms? Will we only ever need to know its application as we have learned it before, or will we need to apply it somehow?

Re: Quantum Numbers

Posted: Sat Dec 07, 2019 9:23 pm
by 105289321
By writing out the electron configuration and seeing whether the arrow is pointed up or down for any specific electron