Marie Work on Uranium

A German physicist discovered that rays can go through solids and even flesh. And then another phyicsist later discovered that other minerals containing uranium gives off rays. and then other scientist discovered X-rays. But Marie decided to investigate the uranium waves. She discovered that the uranium waves emitted had to do with the amount uranium in the compound. She also discovered it doesn't matter the state that the uranium is in and can powdered, dry, wet pure or combined. Marie then discovered that  Trying out various chemicals, Marie found that compounds that contained an uncommon element, thorium, also gave off rays. To describe the behavior of these two elements, Marie made up the term “radioactivity.”