Since people might not be familiar with the unit Angstrom used in the article: it is a shorthand for 10^-10 m = 0.1 nm = 1 Å (Ångström). Edit: Wikipedia entry:

Since people might not be familiar with the unit Angstrom used in the article: it is a shorthand for 10^-10 m = 0.1 nm = 1 Å (Ångström). Edit: Wikipedia entry: https://en.wikipedia.org/wiki/Angstrom https://en.wikipedia.org/wiki/Angstrom