who made the discovery of radioactivity
This invisible something was named radiation, and it was determined that an element that gives off radiation is a radioactive element. Today, we know uranium as one of the radioactive elements. For his discovery of radioactivity, Becquerel was awarded the 1903 Nobel Prize for physics. Review: Henri Becquerel discovered the radioactive properties of uranium when he stored a piece with some film and notched an image on the film.