Everything we can see and touch is made up of chemical elements as illustrated on the Periodic Table of Elements. The heaviest, naturally occurring element is uranium. Using high-energy particle accelerators, scientists have created even heavier elements extending the Periodic Table of Elements up to element 118. Also find out more about element 116, Livermorium, named in in honor of the scientists and research that has been done at LLNL since its discovery. Series: "Lawrence Livermore National Lab Science on Saturday" [Science] [Show ID: 31525]