That makes sense, thanks! I figured the mass/avogadro approach, while extremely useful for lots of stuff, proved not effective here at what I now read to be "what are the electron valence shell diameters". So it seems maybe I answered a question but the wrong question. :) Any thoughts on a different method that would get closer to the published 0.1nm?

been a while since high school chem but i'll give it a shot - at STP you can have approximately 602,214,076,000,000,000,000,000 hydrogen atoms in 22.4 liters. (molar mass ~1, ideal gas law, avogadro's constant)

throwing the above into some division and algebra, so a single atom of hydrogen would be about a 3.7 nanometers3, at stp.

i'm not sure where I went wrong with the above though, as it doesn't really pass the sniff test - several legit websites refer to the diameter of H being about 0.1nm, and semiconductor manufacturing is currently making silicon features around 20-30nm. so, I'm probably incorrect by an order of magnitude, more than i can explain from my sloppy rounding. you'll get a better answer at /r/chemistry or /r/physics probably.

Ja'makin' me hungry mon, those look dope

+spinach +pickle?