|MadSci Network: Chemistry|
When it comes to chemistry, bigger is not always better. The larger a compound's atomic number, the more protons it has in its nucleus. The more protons in an atom, the more inherently unstable it becomes. The highest atomic numbers belong to elements that do not occur in nature simply because they are so unstable. They had to be prepared by scientists in the laboratory, and most of them fall apart within a fraction of a second.
Try the links in the MadSci Library for more information on Chemistry.