Beryllium, the Demon Core, and the Periodic Table of Death and Mystery

In part one of the beryllium (Be) story, you learned that four atomic cores were created for the Manhattan Project, but only three were detonated. The fourth core, nicknamed Rufus, continued to be used in further research … until it killed two careless scientists who mishandled the beryllium tamper. That’s when its name was changed to the Demon Core.