This article is within the scope of WikiProject Chemistry, a collaborative effort to improve the coverage of chemistry on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
The tetrahedron is very special geometric shape in chemistry. The Periodic Table has four major areas that are called s,f,d,p blocks. It was recently discovered that those blocks, if ordered and proportioned in accordance with the quantum numbers, are simply the slices of regular tetrahedron. You can check it out at ADOMAH Periodic Table Web site. -Drova (talk) 13:22, 19 February 2009 (UTC)