The space between an atom's nucleus and it's electrons

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SUMMARY

The discussion centers on the concept of the space between an atom's nucleus and its surrounding electrons, specifically addressing the nature of this space. Participants concluded that this region is essentially devoid of matter, as it is too small to contain air molecules. Instead, quantum mechanics suggests that electrons exist within this space as probability distributions rather than fixed positions, emphasizing the concept of electron cloud density.

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zts1986
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Earlier today I was thinking about what is in between the very few molecules of hydrogen floating around in interstellar space (dark matter?), and a question came to me.

What is in the space between the nucleus of an atom and the electrons that surround that nucleus? The space would be too small for air molecules, so what is there?
 
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Although in a QM sense, the electrons are in the gap just with a low probablility function
 

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