Superheavy elements (IMAGE) DOE/Oak Ridge National Laboratory Caption Nine superheavy elements have been discovered with help from target materials produced at ORNL Some scientists believe the periodic table might extend as high as an element with the atomic number 153. Credit Credit: Jaimee Janiga/ORNL, U.S. Dept. of Energy Usage Restrictions Use with credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.