plutonium /plu·to·ni·um/ (Pu) (ploo-to´ne-um) chemical element, at. no. 94.
plutonium (Pu)
plu·to·ni·um (pl -t  n - m)n. Symbol Pu A naturally radioactive, metallic transuranic element, occurring in uranium ores or produced artificially by neutron bombardment of uranium, used in radionuclide batteries in pacemakers. Its longest-lived isotope is Pu 244 with a half-life of 77 million years. Atomic number 94. |
plutonium (Pu)
[plo̅o̅tō′nē·əm]
Etymology: planet Pluto
a synthetic transuranic metallic element. Its atomic number is 94, and the atomic mass of its longest-lived isotope is 242. A highly toxic heavy metal, plutonium is used in nuclear power plants, and was used in the assembly of early nuclear weapons.
plutonium
a chemical element, atomic number 94, atomic weight 242, symbol Pu. See Table 6.
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