NCIt definition : An artificial radioactive element with long half-life, Plutonium-239 is produced by
bombarding uranium-238 with slow neutrons and is used as the explosive in nuclear
weapons and as fuel for nuclear reactors. Similar to uranium, Plutonium-239 is a heavy,
fissionable metal that accumulates in bones upon exposure and presents health hazards.
Plutonium oxidation results in stable, easily inhaled, particulate plutonium dioxide
that represents a respiratory health hazard. Plutonium ingestion is considerably less
dangerous since little is absorbed in the digestive system. (NCI04);