(1) It is not certain if the effects are due to the chemical or the radioactive properties of uranium .

(2) However, uranium is a heavy metal and the safety limits are based on its toxicity as a metal.

(3) He advises the villagers to drink a lot of milk because the calcium compounds with uranium .

(4) And extracting uranium and storing nuclear waste both produce carbon emissions.

(5) The Curies discovered radium, a radioactive substance, in uranium oxide ore.

(6) A highly radioactive solution of water, plutonium and uranium is constantly leaking out.

(7) All countries have uranium, uranium is a very common material around the world.

(8) Enrichment is a process of purifying uranium for use as nuclear fuel or in weapons.

(9) Depleted uranium is derived from natural uranium mined from the earth's crust.

(10) Enrichment can produce different grades of uranium that can be used for fuel or nuclear warheads.

(11) Workers there recently learned that they were exposed to both plutonium and uranium .

(12) The chemical toxicity of uranium is also well known, though somewhat less well understood.

(13) To develop a comprehensive set of nuclear weapons, enriched plutonium and uranium are needed.

(14) Radioactive uranium oxide pellets were found in a controlled area of the plant.

(15) Radon is produced when trace amounts of uranium and radium in the soil or rocks decay.

(16) The heavy elements like gold or lead or uranium are very rare in the universe.

(17) It is not possible, however, to construct weapons directly out of uranium or slightly enriched uranium .

(18) Depleted uranium is an extremely dense substance derived from enriched uranium .

(19) This time it was uranium and iron ore which provided the much needed employment opportunities.

(20) There are large unexploited nickel deposits, and uranium , vanadium, and gold.