Radium was first discovered in an ore called pitchblende
Radium is a chemical element, not a compound.
Radium is an element; it has no sub-parts. Radium is a radioactive element, so it will slowly and spontaneously decay into other elements.
Radium is a chemical element, not a mixture.
Dust of the radioactive element Radium.
Radium is in the alkaline earth metals.
Radium is an element itself. It was isolated by Marie Curie from Pitchblende, an ore of Uranium.
The valence of radium is 2+.
Radium is an element, atomic number 88.
Radium is not used to produce energy.
marie curei
Radium is a chemical element; a compound has a minimum of two chemical elements.
Your question is meaningless. Radium IS a radioactive element, and its power depends on the context. If you mean "is there an element more radioactive than radium" then yes, there are many, e.g. astatine.