Reference, Questions and Help => Nuke Q&A => Definitions => Topic started by: Rennhack on Nov 24, 2005, 11:53
Title: Plutonium (Pu)
Post by: Rennhack on Nov 24, 2005, 11:53
A heavy, radioactive, manmade metallic element with atomic number 94. Its most important isotope is fissile plutonium-239, which is produced by neutron irradiation of uranium-238. It exists in only trace amounts in nature.