Through two completely different paths, within an hour I discovered two different and very cool sites about the Periodic Table of the Elements. First, the source for the coolest periodic table poster I have ever seen, periodictable.com:

periodic table of the elements poster

Poster of the Elements. Wow!

Next, a project from the University of Nottingham, the Periodic Table of Videos. They’ve done a short video for each of the elements. Here’s sodium: