The Periodic Table of the Elements, by electronic structure
In this beautiful, easy-to-read periodic table, created by London-based graphic designer Alison Haigh, each element is represented by a visualization of its electronic structure, rather than by numbers and letters.
The dots each represent electrons—so, hydrogen, which has an atomic number of 1, is the single dot in the upper lefthand corner.
Some transition metals, by electronic structure
Here is the radioactive synthetic element Copernicium, which has an atomic number of 112 (and was first created in 1996 by scientists in Germany):