Frederick Soddy

Frederick Soddy was a British chemist and Nobel laureate known for his work on radioactivity and atomic theory. He helped explain how certain elements change into others over time, a process called radioactive decay, which led to a better understanding of atomic structure. Soddy introduced the concept of isotopes—atoms of the same element with different masses—and contributed to the development of nuclear science. His insights laid the groundwork for understanding nuclear energy and the stability of elements, significantly advancing our knowledge of the atom and its transformations.