My chemistry textbook was right all along!
The first image below is from the group's AFM of a single pentacene (C22H14) molecule on a copper (Cu(111)) substrate. The second picture shows the conventional chemical structure diagram (the vertices are carbon, and one hydrogen hangs off of each exterior corner), and the third is a "ball" model, with carbon atoms in black and hydrogen in white. As discussed in the article, the whole molecule is just 1.4 nm long, with a spacing of 0.14 nm between adjacent carbon atoms.
The paper is out in today's Science, but it's pay-per-view.