Four Different Quantum Numbers

Moderators: Chem_Mod, Chem_Admin

Jessica Urzua-1H
Posts: 37
Joined: Tue Nov 14, 2017 3:01 am

Four Different Quantum Numbers

Postby Jessica Urzua-1H » Sat Apr 28, 2018 6:13 pm

It is known that two electrons cannot have the same four quantum numbers, and I just wanted to know more specifically why that is. Any clarification would be great!

Marisol Sanchez - 1E
Posts: 38
Joined: Fri Apr 06, 2018 11:05 am

Re: Four Different Quantum Numbers

Postby Marisol Sanchez - 1E » Sat Apr 28, 2018 6:18 pm

I believe this has to do partially with the negative charge of electrons. They repel each other if in close proximity and if two electrons were to have the same four quantum numbers, they would theoretically be found in the same place with the same energy, same angular motion, and same spin direction. Each electron must have its own space and a difference in at least one of the quantum numbers dictates a slightly different space.

Michael Park
Posts: 30
Joined: Fri Apr 06, 2018 11:04 am
Been upvoted: 1 time

Re: Four Different Quantum Numbers

Postby Michael Park » Sun Apr 29, 2018 7:19 pm

Only the first three quantum numbers (n, l, ml,) can be the same. Electron spin must either be 1/2 or -1/2

JulietOttenberg-1C
Posts: 25
Joined: Fri Apr 06, 2018 11:04 am

Re: Four Different Quantum Numbers

Postby JulietOttenberg-1C » Sun Apr 29, 2018 7:26 pm

This refers to how there can be two electrons in an orbital but they are not moving in the same direction. There can be six electrons in the 2P energy level, but in every electron pair, they are drawn going in the opposite directions (one of the arrows points up and the other points down)

Alma Flores 1D
Posts: 64
Joined: Wed Nov 08, 2017 3:01 am

Re: Four Different Quantum Numbers

Postby Alma Flores 1D » Sun Apr 29, 2018 9:39 pm

There can be a maximum of two electrons in the same orbital. Their Spin Magnetic Quantum Number cannot be the same, since they have opposite spins. This is supported by the Pauli Exclusion Rule.

Chris Qiu 1H
Posts: 31
Joined: Fri Apr 06, 2018 11:04 am

Re: Four Different Quantum Numbers

Postby Chris Qiu 1H » Sun Apr 29, 2018 9:43 pm

This basically means that no electron can have the same spin as any other electron and there are set number of electrons that can be in one orbital.

Natalie_Martinez_1I
Posts: 30
Joined: Mon Feb 26, 2018 3:00 am

Re: Four Different Quantum Numbers

Postby Natalie_Martinez_1I » Sun Apr 29, 2018 10:45 pm

There are 4 different quantum numbers and each gives you an idea of where the electron is located in an atom. 2 electrons can't share more than 3 numbers because that would mean that they are in the same location which is not possible because they would repel each other due to like charges.

Jacy Black 1C
Posts: 30
Joined: Fri Apr 06, 2018 11:01 am

Re: Four Different Quantum Numbers

Postby Jacy Black 1C » Mon Apr 30, 2018 1:22 pm

I think it makes sense to view it as the numbers helping us know where the electrons are located in space. Only two electrons of opposite spin can inhabit the same orbital. This would mean that all of their quantum numbers would be the same except for the spin magnetic quantum number. If all four quantum numbers were the same, this would mean that electrons of the same spin (two upward arrows or two downward arrows) were inhabiting the same space which cannot be allowed. Think of it like opposites attract, and same spin signs repel one another. I hope this helped!


Return to “Quantum Numbers and The H-Atom”

Who is online

Users browsing this forum: No registered users and 2 guests