xenon is usually a waste product of nuclear reactors and although has power not that much
There are 40 unstable isotopes (an element contained in xenon) that undergo radioactive decay.
Nothing abnormal; radon is also a noble gas and radioactive.
Xenon gas even though it is not radioactive.
Plutonium is a radioactive chemical element; practically all plutonium is man made - in the nature plutonium is extremely rare.
None of the isotopes of xenon ordinarily found in nature is radioactive. Like all elements, xenon has synthetic radioactive isotopes.
Xenon is an element.
Yes, the radioactive decay of Uranium-235 is used to produce power in nuclear power plants.
Yes - Xenon is element 54
Xenon is a natural chemical element.
xenon is an inert gas element
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.
It came mostly from nova and supernova explosions. It was also produced by red giants which had burned up their hydrogen and entered the asymptotic giant phase.Nova explosions also produced radioactive isotopes and xenon can be produced by radioactive decay of iodine, uranium and plutonium.