A heavy, fissionable, radioactive, metallic element (atomic number 94) that occurs naturally in trace amounts. It can also result as a byproduct of the fission reaction in a uranium-fuel nuclear rea [..]

Plutonium - the 94th element in the classification of elements - was discovered in 1940 by the American researchers Seaborg, McMillan, Wahl and Kennedy as the second transuranium element upon bombardm [..]

transuranic element, 1942, from Pluto, the planet, + element ending -ium. Discovered at University of California, Berkeley, in 1941, the element named on suggestion of Seaborg and Wahl because it foll [..]

An element with atomic number 94 formed as a by-product of nuclear fission in reactors. Plutonium has several isotopes, the most common of which is plutonium-239.

chemical element with the symbol Pu. Used to make nuclear weapons and as a power source.

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.

a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 1 [..]

A transuranic element with atomic number 94, produced when uranium is irradiated in a reactor. It is used primarily in nuclear weapons and, along with uranium, in mixed-oxide (MOX) fuel. Plutonium-239 [..]

A heavy radioactive, man-made metallic element. Its most important isotope is fissionable plutonium-239, produced by neutron irradiation of uranium-238. Plutonium-239 is used as a fuel for power reactors or explosive for nuclear weapons.

A radioactive metallic element used in the production of nuclear energy and explosives.

a heavy, man-made, radioactive metallic element. The most important isotope is Pu-239, which has a half-life of 24,000 years. Pu-239 can be used in reactor fuel and is the primary isotope in weapons. [..]

A heavy, radioactive, man-made metallic element with atomic number 94. Its most important isotope is fissile plutonium-239 which is produced by neutron irradiation of uranium-238, followed by a two-st [..]

(n) a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactor [..]

A heavy man-made radioactive metal. Its most important isotope is fissionable plutonium-239, which can be used for reactor fuel.

  A fissile material that can be used in nuclear weapons and nuclear reactors.  Plutonium is man-made—primarily in nuclear reactors where uranium-238 absorbs a neutron, eventually creating plutonium-239 and other plutonium isotopes.

 "A radioactive element that occurs in only trace amounts in nature. When produced by irradiating uranium fuels, plutonium contains varying percentages of the isotopes Pu-238, 239, 240, 241, and 242. Plutonium containing any Pu-239 is considered a special fissionable material. The International Atomic Energy Agency has defined 8 kg of plutoniu [..]

The bomb dropped on Nagasaki (“Fat Man”) utilized the fission of plutonium, created by detonating an explosive around a ring of pie-shaped masses of plutonium, driving them to collide simultaneously i [..]

Symbol:"Pu" Atomic Number:"94" Atomic Mass: (244)amu. Plutonium is one of the elements in the actinide series of inner transition elements. It may be classified as [..]

A radioactive metallic element chemically similar to uranium.

A radioactive metallic element chemically similar to uranium.

A radioactive metallic element chemically similar to uranium.

Plutonium. A naturally radioactive element of the Actinide Metals series. It has the atomic symbol Pu, atomic number 94, and atomic weight 242. Plutonium is used as a nuclear fuel, to produce Radioiso [..]

Plutonium. A naturally radioactive element of the actinide metals series. It has the atomic symbol Pu, atomic number 94, and atomic weight 242. Plutonium is used as a nuclear fuel, to produce radioiso [..]

A man made element used to make nuclear weapons. Testing of these nuclear weapons has caused plutonium to be dispersed into the environments soil. As plutonium decays it releases radiation and forms o [..]

plutonium