plutonium, Pu, atomic number 94(noun)
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; 13 isotopes are known with the most important being plutonium 239
The transuranic chemical element with atomic number 94 and symbol Pu.
Origin: After Pluto (the entity formerly considered to be a planet).
Plutonium is a transuranic radioactive chemical element with the symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forming a dull coating when oxidized. The element normally exhibits six allotropes and four oxidation states. It reacts with carbon, halogens, nitrogen, and silicon. When exposed to moist air, it forms oxides and hydrides that expand the sample up to 70% in volume, which in turn flake off as a powder that can spontaneously ignite. It is radioactive and can accumulate in the bones. These properties make the handling of plutonium dangerous. Plutonium is the heaviest primordial element by virtue of its most stable isotope, plutonium-244, whose half-life of about 80 million years is just long enough for the element to be found in trace quantities in nature. Plutonium is mostly a byproduct of nuclear reactions in reactors where some of the neutrons released by the fission process convert uranium-238 nuclei into plutonium. Both plutonium-239 and plutonium-241 are fissile, meaning that they can sustain a nuclear chain reaction, leading to applications in nuclear weapons and nuclear reactors. Plutonium-240 exhibits a high rate of spontaneous fission, raising the neutron flux of any sample containing it. The presence of plutonium-240 limits a sample's usability for weapons or reactor fuel, and determines its grade.
U.S. National Library of Medicine
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 radioisotopes for research, in radionuclide batteries for pacemakers, and as the agent of fission in nuclear weapons.
A chemical element with a known atomic number and symbol.
Plutonium is used as a component to create a form of nuclear fuel.Submitted by MaryC on January 11, 2017
The numerical value of plutonium in Chaldean Numerology is: 8
The numerical value of plutonium in Pythagorean Numerology is: 6
Examples of plutonium in a Sentence
In this whole mess (at Areva) we have a huge amount of Japanese plutonium.
There is a mismatch between the current stockpile of the plutonium in Japan and its real need for development.
Giving its plutonium away and paying for it would expose the Japanese to the reality of plutonium as a liability rather than an asset.
Meaning, the condition that you say is dangerous and can produce plutonium, we will return to that unless you take action regarding all your commitments regarding Arak.
If anything can stop Iran from getting nuclear weapons, it is maintaining the united bipartisan front in Congress to end Iran's uranium enrichment and plutonium paths to the bomb.
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Translations for plutonium
From our Multilingual Translation Dictionary
- plutoniCatalan, Valencian
- plutòiniamScottish Gaelic
- PlutoniumLuxembourgish, Letzeburgesch
- plutoniumNorwegian Nynorsk
- плутониј, plutonijSerbo-Croatian
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