Can an atom condense (collapse?) under gravity to a volume less than the nucleus?
The Big Bang is the example motivating the question - if the entire mass of the universe is condensing to some minimal size then does that mean atomic nuclei no longer exist? ... are 'superimposed' or such?
Another way of asking this is 'Is there a minimum distance required for adjacent waves to exist?'
ALTERNATE PERSPECTIVE ADDED ... How does the total volume of all the atoms in the universe compare with whatever scale of 'soup' would exist at The Big Bang. Is there so much space between atomic particles, and their constituent quarks, to account for the ridiculously small size of the big bang 'ball'.