What Determines the Spin of an Unpaired Electron in an Atom?

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    Electrons Spin
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Discussion Overview

The discussion centers on the factors that determine the spin of an unpaired electron in an atom, exploring whether the spin is random and the implications of conventions in electron configuration notation. The scope includes conceptual understanding and the influence of external conditions such as magnetic fields.

Discussion Character

  • Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions what determines the spin of an unpaired electron and whether it is random, noting that both +1/2 and -1/2 spins are considered equally correct in electron configurations.
  • Another participant suggests that in the absence of a magnetic field, the spin of the unpaired electron will be random.
  • A third participant agrees that spins are random without an external magnetic field and mentions that the convention of listing +1/2 first is not reflective of any real-world influence.
  • A later reply expresses appreciation for the clarification on the convention of drawing unpaired electrons with a spin of +1/2.

Areas of Agreement / Disagreement

Participants generally agree that the spin of an unpaired electron is random in the absence of external influences, but there is no consensus on the implications of this randomness or the significance of the convention used in notation.

Contextual Notes

There is an acknowledgment of the dependence on external conditions, such as the presence of a magnetic field, which may influence the spin but is not fully explored in the discussion.

pzona
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In an atom with an unpaired electron, what determines the spin of the unpaired electron? When writing electron configurations, I know that writing the unpaired electron as having spins of +1/2 and -1/2 are equally correct, so does this mean that spin is random? If not, what factors influence it?
 
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In the absence of a magnetic field (or other spin to couple to), it'll be random, yeah.
 
They are random, especially if there is no external magnetic field.

I am not sure and unfortunately I have temporarily no acces to my GenChem books, but as far as I remember we usually list +1/2 as first, but that's just convention and it has nothing to do with the real world.

Edit: alxm was much faster, I started with answering other threads...

--
methods
 
Thanks for the responses. I usually draw unpaired electrons with a spin of +1/2 out of habit, glad to know that's the convention.
 

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