The Discovery of Thorium

The fascinating journey of thorium began in 1815 with a misidentification that led to its eventual recognition as a new element in 1828. Its first significant application emerged in gas lamp mantles, showcasing its high melting point. The element's radioactivity was confirmed by researchers, paving the way for groundbreaking discoveries in the field of nuclear science, including the concept of half-lives and the identification of radon as a decay product. With a half-life of 14.05 billion years, thorium's stability is almost as old as the universe itself.