The size of an atom is only a few angstroms at most - there are 10 billion angstroms in 1 meter. This video also goes the basic parts of an atom (protons, neutrons, and electrons) and why the ...

The tiniest “ruler” ever is so precise that it can measure the width of a single atom within a protein. “We wanted to go from a microscope that maps positions of macromolecules relative to each other, ...