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Are there spaces in between air molecules? If yes what is in those spaces?

Not only is there empty space in between molecules, there is empty space INSIDE molecules and atoms!

John Hawley

This question is actually a very old one - the greeks debated "atomism", with the objection to "atoms" being that if you have atoms, then you must have empty space between atoms, and this did not seem to make sense. Well, it turns out to be true - space has a structure all by itself, and atoms and molecules just move around in it. Of course, there are electromagnetic fields and other similar things that penetrate space everywhere, so even empty space is not really quite empty. So maybe both sides were right.

Arthur Smith

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