10-9 meters

More at 1 nanometer

Pictured below is a periodic table of the chemical elements -- in a rather unusual form. This unique table is the work of a Professor Benfey.

Dimitri Mendeleev is given credit for creating the Period Table of the Elements in which he clearly illustrated the periodic relationship between chemical groups, leaving gaps in his chart predicting the discovering of unknown elements.

Copyright © 2016 by Bruce Bryson