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The next possible nuclear fuel is actually Thorium, but will likely remain Uranium
nothing
what possible future nuclear fuel
Uranium is a radioactive element used to fuel nuclear reactors. It is a nuclear fuel.
One metallic element commonly used in nuclear power plants is uranium. It is used as fuel in nuclear reactors to undergo fission and produce energy. Another metallic element used in nuclear plants is zirconium, which is used to make fuel rods that house the uranium fuel.
Gold is a very stable element and would be no use as nuclear fuel
It is possible if the element undergoes nuclear decay. But this is possible only for unstable isotopes.
The element used as a fuel component in most nuclear reactors is uranium. Specifically, uranium-235 is the primary isotope used for nuclear fission reactions in nuclear power plants.
To make fuel rods for nuclear reactors
Uranium I think
Th, element 90, spelled thorium, is an actinide and has been used as a nuclear fuel (see Wikipedia.)
Plutonium is a chemical element, radioactive, solid, metal, artificial (but exist also as a natural element in extremely low concentrations in uranium ores). Plutonium is essential for nuclear reactors (as fuel) and for nuclear weapons (as explosive).