A hydrogen atom is generally two up quarks and one down quark, making up a proton, and one electron. The force carriers and occasionally neutrinos show up for interactions, but most of the rest only appear on earth in particle accelerators.
Thank you. That is what I was thinking but the different sizes kind of got me.
Re "sizes", fwiw, you might like [1]. Something I wrote as conversation prep - loads slowwwwly. Quarks are much smaller than their proton. IIRC, >1000x smaller.
If you don't mind watching a nearly 50 year old video then I can recommend "Powers of Ten" [0], attempting to visualize the different scales on which things are happening in the universe we know of. It is a very short video, just 9 minutes long.