element
Definitions of element
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one of four substances thought in ancient and medieval cosmology to constitute the physical universetypes:etherthe fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies
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any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all mattertypes:edelgasany of the chemically inert gaseous elements of the helium group in the periodic tablemetaalany of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.Ar, argona colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphereAs, arseen, arsenicuma very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgarAt, astaat, astatiuma highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thoriumB, boor, boriuma trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powderBr, bromium, brooma nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea waterC, Celsius, koolspits, koolstofan abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compoundsCl, chloora common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water)F, fluora nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatiteGe, germaniuma brittle grey crystalline element that is a semiconducting metalloid (resembling silicon) used in transistors; occurs in germanite and argyroditeHe, helium, zonnegasa very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)H, hydrogeen, hydrogenium, waterstofa nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universeI, jodium, jooda nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks)Md, mendeleviuma radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol)Ne, neona colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amountsN, azotum, nitrogeen, stikstofa common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissuesNo, nobeliuma radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are knownO, oxygenium, zuurstofa nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crustP, fosfora multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells; is highly reactive and occurs in several allotropic formsPu, plutoniuma 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 239Rn, radona radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to healthSe, seleen, seleniuma toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)Si, kiezel, siliciuma tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistorsS, solfer, sulfer, zwavelan abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions)Te, tellurium, telluura brittle silver-white metalloid element that is related to selenium and sulfur; it is used in alloys and as a semiconductor; occurs mainly as tellurides in ores of copper and nickel and silver and goldXe, xenona colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amountsAm, americiuma radioactive transuranic metallic element; discovered by bombarding uranium with helium atomsSb, antimonium, antimoona metallic element having four allotropic forms; used in a wide variety of alloys; found in stibniteBi, aslood, astin, bismuta heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metalsCd, cadmiuma soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc oresCa, calciuma white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animalsCf, californiuma radioactive transuranic element; discovered by bombarding curium with alpha particlesCe, ceriuma ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth groupCs, caesium, cesiuma soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metalCr, chromium, chroom, chroomleera hard brittle multivalent metallic element; resistant to corrosion and tarnishingCo, kobalta hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutritionCm, cirium, curiuma radioactive transuranic metallic element; produced by bombarding plutonium with helium nucleiDy, dysprosiuma trivalent metallic element of the rare earth group; forms compounds that are highly magneticFm, fermiuma radioactive transuranic metallic element produced by bombarding plutonium with neutronsFr, franciuma radioactive element of the alkali-metal group discovered as a disintegration product of actiniumGd, gadoliniuma ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth groupGa, galliuma rare silvery (usually trivalent) metallic element; brittle at low temperatures but liquid above room temperature; occurs in trace amounts in bauxite and zinc oresHf, hafniuma grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electronsHo, holmiuma trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compoundsIr, iridiuma heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmiumFe, ijzer, kluwen, knota heavy ductile magnetic metallic element; is silver-white in pure form but readily rusts; used in construction and tools and armament; plays a role in the transport of oxygen by the bloodLa, lanthaana white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earthLi, lithiuma soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several mineralsLu, lutetiuma trivalent metallic element of the rare earth group; usually occurs in association with yttriumMg, magnesiuma light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine)Mn, mangaana hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many mineralsHg, Mercurius, kwik, kwikzilvera heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperaturesMo, molybdeena polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steelNd, neodymium, neodyniuma yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymiumNp, neptuniuma radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutoniumNi, nikkel, stuivera hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and milleriteNb, niobiuma soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbiumOs, osmiuma hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal knownPd, palladiuma silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelryPo, poloniuma radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactorK, kaliuma light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvitePr, praseodymiuma soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange processPm, promethiuma soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uraniumPa, protactiniuma short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into leadRe, renium, rheniuma rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenumRh, rhodium, rodiuma white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinumRb, rubidiuma soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and polluciteRu, rutenium, rutheniuma rare polyvalent metallic element of the platinum group; it is found associated with platinumSm, samariuma grey lustrous metallic element of the rare earth group; is used in special alloys; occurs in monazite and bastnasiteSc, scandiuma white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveititeNa, natriuma silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)Sr, strontiuma soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianiteTa, tantaal, tantaliuma hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantaliteTc, technetiuma crystalline metallic element not found in nature; occurs as one of the fission products of uraniumTb, terbiuma metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbiteTl, thalliuma soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron oresTh, thoriuma soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sandsTm, thuliuma soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotimeSn, conservenblik, tina silvery malleable metallic element that resists corrosion; used in many alloys and to coat other metals to prevent corrosion; obtained chiefly from cassiterite where it occurs as tin oxideTi, titaan, titaniuma light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmeniteW, wolfraam, wolframieta heavy grey-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheeliteU, uraniuma heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weaponsV, vanadiuma soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadiniteYb, ytterbiuma soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotimeY, yttriuma silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloysZn, zinka bluish-white lustrous metallic element; brittle at ordinary temperatures but malleable when heated; used in a wide variety of alloys and in galvanizing iron; it occurs naturally as zinc sulphide in zinc blendeZr, zirkonium, zirkoona lustrous grey strong metallic element resembling titanium; it is used in nuclear reactors as a neutron absorber; it occurs in baddeleyite but is obtained chiefly from zirconhoutskoola carbonaceous material obtained by heating wood or other organic matter in the absence of airalkalimetaalany of the monovalent metals of group I of the periodic table (lithium or sodium or potassium or rubidium or cesium or francium)roet, zwartsela black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and inkdiamantvery hard native crystalline carbon valued as a gem
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an abstract part of somethingsynonyms: bestanddeel, component, constituent, factor, ingrediënt, vermenigvuldigingsfactortypes:punta geometric element that has position but no extensiontype of:hoofdafdelingone of the portions into which something is regarded as divided and which together constitute a whole
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an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a systemsynonyms: bestanddeel, component, constituent, kiezer, onderdeel, stemmer, verwarmingselementtypes:kristala crystalline element used as a component in various electronic devicesapparatuur, hardware(computer science) the mechanical, magnetic, electronic, and electrical components making up a computer systemingrediënta component of a mixture or compoundbeeldelement, pixel(computer science) the smallest discrete component of an image or picture on a CRT screen (usually a colored dot)reserveonderdeelan extra component of a machine or other apparatusCPU, CVE, besturingseenheid, besturingsorgaan, mainframe, processor(computer science) the part of a computer (a microprocessor chip) that does most of the data processing
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one of several parts or pieces that fit with others to constitute a whole object
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an electro-acoustic transducer that is the part of the arm of a record player that holds the needle and that is removablesynonyms: huls, patroonhuls
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a device that delivers an electric current as the result of a chemical reaction
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anything that belongs to a set or classtype of:portiesomething determined in relation to something that includes it
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