Groups of The Periodic Table
Description of the groups of the periodic table of the elements.
An interesting article I found in a book about the discovery of matter. Enjoy.
A list of all the elements electron configuration in the form of levels, sublevels, and orbitals.
A theory of the structure of the physical world that was put forth by Aristotle and was once widely believed and accepted. Although we now know this to be false, it is still intriguing to explore some of the tenets and concepts behind this once much-vaunted theory.