Ok, the xkcd is about nanobots with a volume of "a few cubic microns"[1], whereas atoms are much smaller.
[1] https://www.explainxkcd.com/wiki/index.php/865:_Nanobots
Ok, the xkcd is about nanobots with a volume of "a few cubic microns"[1], whereas atoms are much smaller.
[1] https://www.explainxkcd.com/wiki/index.php/865:_Nanobots