"ms" Quantum Number [ENDORSED]

[Jose Lupian 1C]

I know that the quantum number "ms" stands for the electronic spin, which is ±1/2. I just wanted to know what specific examples this concept would be applied towards because I don't think we have covered an example dealing with the "ms" quantum number.

[Luis Torres 1C]

From questions I have seen, one important use of this concept is when a question asks "how many electrons are possible given the following quantum numbers?". An example of this is on another question that I think could help demonstrate how these questions are asked.

viewtopic.php?f=21&t=31360

[Gabi Landes 1-H]

I believe if the question gives you all quantum four numbers (the Principal Quantum Number "n", Orbital Angular Momentum Quantum Number "l", Magnetic Quantum Number "m_l" and Electron Spin Quantum Number "m_s") then only 1 electron can be in that exact state. Because "In chemistry, an electron pair or a Lewis pair consists of two electrons that occupy the same molecular orbital but have opposite spins" so on the other hand if "m_s" is not given, 2 electrons could theoretically be in that orbital.