I DONT WANNA DO ANGSTROMS
ohhh yeah wait somethin is wrong, i am getting 1.6e-23 from a simpler method
once again check if i got that horribly wrong
in picometres, it would be 1.700000000000000036e-23, or 0.00000000000000000000001700000000000000036 pm
i put some numbers in a calculator, and whilst this may be extremely wrong, Planck length is around 1.7e-25 Angstroms or 0.00000000000000000000000017 Angstroms, check that ongod bro do not take my word for it
Smallest things in the universe: this save's score
hopefully that covers it, however if i have made an error then correct it
On the wikipedia page for Planck units, it states "The Planck length is about 10^-20 times the diametre of a proton."
Protons and neutrons are somewhat confusing, with the charge radius wikipedia page describing a proton as having a radius of roughly one femtometre, whilst the neutron never has the radius described as far as my skimming is concerned (from looking further again, a proton is 1.7x10^-5 Angstroms)
As for an atom of hydrogen, I cannot find anything on it, probably because at these scales the size of something, especially an electron cloud, can't be well defined (from looking further, on the wikipedia page Angstrom, the width of a hydrogen atom is about 1.1 Angstroms)