n
(chemistry) Any of the 14 elements from actinium to nobelium (lawrencium is excluded by some authors as it is a d-block rather than an f-block element).
n
(uncountable) The chemical element (symbol C) with an atomic number of 6. It can be found in pure form for example as graphite, a black, shiny and very soft material, or diamond, a colourless, transparent, crystalline solid and the hardest known material.
n
(nuclear physics, historical) Depleted uranium.
n
Uranium that contains a reduced (depleted) amount of the fissile isotope U-235 compared to natural uranium; it is used in applications where the nuclear properties of the uranium are not important, and the uranium is instead being used for its mechanical or chemical properties.
n
Initialism of depleted uranium. [Uranium that contains a reduced (depleted) amount of the fissile isotope U-235 compared to natural uranium; it is used in applications where the nuclear properties of the uranium are not important, and the uranium is instead being used for its mechanical or chemical properties.]
n
Alternative spelling of eka-aluminium [(chemistry, archaic) gallium]
n
(dated) Synonym of flerovium
n
Alternative spelling of eka-platinum [darmstadtium]
n
(chemistry, military) Uranium enriched with a higher than normal amount of the fissile isotope U-235; used in nuclear reactors and nuclear weapons.
n
Abbreviation of high-assay low-enriched uranium.; enriched uranium of 5%-20% enrichment
n
Initialism of high-entropy alloy. [(metallurgy) a type of metallic alloy containing not one dominant element, but multiple major elements, with a single crystalline structure and existing in a single phase]
n
Initialism of highly-enriched uranium. [(nuclear physics, military) Enriched uranium containing at least 20% uranium-235 (some applications, such as fission weapons and naval reactors, use uranium enriched to as high as 80-95% uranium-235), and therefore capable of sustaining a nuclear fission chain reaction without needing a moderator; used in nuclear weapons and in a few types of nuclear reactors requiring very high power density or high neutron flux.]
n
(nuclear physics, military) Enriched uranium containing at least 20% uranium-235 (some applications, such as fission weapons and naval reactors, use uranium enriched to as high as 80-95% uranium-235), and therefore capable of sustaining a nuclear fission chain reaction without needing a moderator; used in nuclear weapons and in a few types of nuclear reactors requiring very high power density or high neutron flux.
adj
(chemistry) containing trivalent iridium
n
A native compound of iridium and osmium.
n
(nuclear) Initialism of low-enriched uranium. [(nuclear physics) Enriched uranium with at least 2% but less than 20% uranium-235, enough to sustain a nuclear fission chain reaction in a nuclear reactor moderated by light water but not enough to allow a self-sustaining fission chain reaction without a moderator; used as the main nuclear fuel in most commercial nuclear reactors used to generate electricity.]
n
Lithium oxide, Li₂O, used in the manufacture of ceramics and glass.
n
(nuclear physics) Enriched uranium with at least 2% but less than 20% uranium-235, enough to sustain a nuclear fission chain reaction in a nuclear reactor moderated by light water but not enough to allow a self-sustaining fission chain reaction without a moderator; used as the main nuclear fuel in most commercial nuclear reactors used to generate electricity.
n
An alloy or rare earth elements containing about 50% cerium and 50% lanthanum, neodymium, and similar elements used especially as a flint in cigarette lighters
n
(uncountable) A silvery elemental metal with an atomic number of 28 and symbol Ni.
adj
(archaic) Of or pertaining to niobium.
n
An alloy of nickel and titanium that has the ability to return to a predetermined shape when heated.
n
(chemistry) Any of the elements of group 18 of the periodic table, being monatomic and (with very limited exceptions) inert.
n
(inorganic chemistry, alchemy) A metal resistant to corrosion, oxidizing and tarnishing, such as gold, platinum, copper and mercury.
n
Any element that is not an actinide.
n
(nuclear physics, historical) Highly-enriched uranium.
n
A coarse, sponge-like form of elemental palladium that offers a large surface area for hydrogen adsorption and can be used as a catalyst for hydrogenation reactions.
adj
(chemistry) Containing potassium.
n
(chemistry, obsolete) Mercuric oxide (HgO), a heavy red crystalline powder obtained by heating mercuric nitrate, or by heating mercury in the air.
n
(countable) A single atom of this element.
adj
(chemistry) Pertaining to, or containing, ruthenium; designating those compounds in which it has a lower valence as contrasted with ruthenic compounds.
n
Initialism of slightly-enriched uranium. [(nuclear physics) Enriched uranium with 0.9-2% uranium-235, requiring a special moderator with very low neutron absorption (such as heavy water or high-purity graphite) in order to be able to sustain a nuclear fission chain reaction. Used to increase power output and efficiency in a few types of nuclear reactors capable of running on natural uranium, and for downblending of highly-enriched uranium from decommissioned nuclear weapons into low-enriched uranium suitable for use in commercial power reactors.]
n
Alternative form of slightly-enriched uranium [(nuclear physics) Enriched uranium with 0.9-2% uranium-235, requiring a special moderator with very low neutron absorption (such as heavy water or high-purity graphite) in order to be able to sustain a nuclear fission chain reaction. Used to increase power output and efficiency in a few types of nuclear reactors capable of running on natural uranium, and for downblending of highly-enriched uranium from decommissioned nuclear weapons into low-enriched uranium suitable for use in commercial power reactors.]
n
(nuclear physics) Enriched uranium with 0.9-2% uranium-235, requiring a special moderator with very low neutron absorption (such as heavy water or high-purity graphite) in order to be able to sustain a nuclear fission chain reaction. Used to increase power output and efficiency in a few types of nuclear reactors capable of running on natural uranium, and for downblending of highly-enriched uranium from decommissioned nuclear weapons into low-enriched uranium suitable for use in commercial power reactors.
adj
(chemistry) Lying beyond uranium in the periodic table; having an atomic number greater than 92.
n
(historical) Natural uranium in the refined condition.
n
(chemistry, obsolete) A heavy yellow powder with chemical formula Hg₃O₂SO₄.
adj
(physics, chemistry) Describing any atom that has a very large atomic weight; especially those that lie beyond fermium in the periodic table
adj
(chemistry) Containing uranium in higher valences than uranous compounds.
adj
(chemistry) Of or pertaining to uranium; containing uranium.
n
A form of decorative glass with a fluorescent effect, achieved by adding uranium, usually in oxide diuranate form, added to the glass before melting.
adj
(chemistry) Containing uranium in lower valences than uranic compounds.
n
Initialism of zinc-aluminium (alloy).
n
Any of a family of alloys with a zinc base and alloying elements of aluminium, magnesium, and copper.
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