What Is the Lightest Elements in the Periodic Table?

After their discovery, perels and fris were worried that the nases had already found out how to weaponize uranium. They shared this terrifying thought in their famous memorandum, a short written report on a specific topic. As soon as s president franklin roosevelt read it, he started the manhattan project. In a strange twist of history, it turned out that hitler hadn't been building atomic bombs at all.