Probably you think at radium.
Yes, uranium is a radioactive element.
Yes, uranium is a natural but radioactive element.
Uranium is unstable, radioactive element.
Uranium ia a radioactive and toxic element.
Radioactivity is discovered on uranium.
Normally Uranium but some other radioactive materials are occasionally used.
Probably uranium is the best known radioactive element.
Uranium is an example of an actinde; also uranium is a solid metal, radioactive, a natural chemical element.
Uranium is a natural chemical element, situated in the actinides group; uranium is a solid metal, radioactive.
1. Uranium is a possible polluting agent of the natural environment. 2. Uranium is a toxic and a radioactive chemical element. 3. Uranium release radium and radon. 4. Radioactive wastes are dangerous and need to be isolated.
All the isotopes of uranium are radioactive and unstable.
Uranium is a natural chemical element, a metal and is radioactive.