atomic

Synoym, Definition, Related Contents for atomic

Searched WordTypeDefinition
atomica(weapons) deriving destructive energy from the release of atomic energy
atomicaof or relating to or comprising atoms
atomicsimmeasurably small
atomic bombna nuclear weapon in which enormous energy is released by nuclear fission (splitting the nuclei of a heavy element like uranium 235 or plutonium 239)
atomic clockna timepiece that derives its time scale from the vibration of atoms or molecules
atomic cocktailnan oral dose of radioactive substance used in treatment and diagnosis of cancer
atomic energynthe energy released by a nuclear reaction
atomic energy commissionna former executive agency (from 1946 to 1974) that was responsible for research into atomic energy and its peacetime uses in the United States
atomic explosionnthe explosion of an atomic bomb
atomic massn(chemistry) the mass (in atomic mass units) of an isotope of an element
atomic mass unitnunit of mass for expressing masses of atoms or molecules
atomic numbernthe order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of an atom of an element
atomic number 1na nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
atomic number 10na 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 amounts
atomic number 100na radioactive transuranic metallic element produced by bombarding plutonium with neutrons
atomic number 101na radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol)
atomic number 102na radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known
atomic number 103na radioactive transuranic element synthesized from californium
atomic number 104na radioactive transuranic element which has been synthesized
atomic number 105na transuranic element
atomic number 106na transuranic element
atomic number 107na transuranic element
atomic number 108na radioactive transuranic element
atomic number 109na radioactive transuranic element
atomic number 11na 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)
atomic number 110na radioactive transuranic element
atomic number 111na radioactive transuranic element
atomic number 112na radioactive transuranic element
atomic number 113na radioactive transuranic element
atomic number 114na radioactive transuranic element
atomic number 115na radioactive transuranic element
atomic number 116na radioactive transuranic element
atomic number 12na 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)
atomic number 13na silvery ductile metallic element found primarily in bauxite
atomic number 14na 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 transistors
atomic number 15na 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 forms
atomic number 16nan 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)
atomic number 17na 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)
atomic number 18na colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
atomic number 19na 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 sylvite
atomic number 2na 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)
atomic number 20na 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 animals
atomic number 21na white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite
atomic number 22na light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite
atomic number 23na soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadinite
atomic number 24na hard brittle multivalent metallic element; resistant to corrosion and tarnishing
atomic number 25na hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals
atomic number 26na 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 blood
atomic number 27na hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
atomic number 28na hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite
atomic number 29na ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor
atomic number 3na soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals
atomic number 30na 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 as zinc sulphide in zinc blende
atomic number 31na rare silvery (usually trivalent) metallic element; brittle at low temperatures but liquid above room temperature; occurs in trace amounts in bauxite and zinc ores
atomic number 32na brittle grey crystalline element that is a semiconducting metalloid (resembling silicon) used in transistors; occurs in germanite and argyrodite
atomic number 33na 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 realgar
atomic number 34na 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)
atomic number 35na nonmetallic largely pentavalent heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water
atomic number 36na colorless element that is one of the six inert gasses; occurs in trace amounts in air
atomic number 37na soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite
atomic number 38na soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite
atomic number 39na silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys
atomic number 4na light strong brittle grey toxic bivalent metallic element
atomic number 40na 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 zircon
atomic number 41na soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium
atomic number 42na polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel
atomic number 43na crystalline metallic element not found in nature; occurs as one of the fission products of uranium
atomic number 44na rare polyvalent metallic element of the platinum group; it is found associated with platinum
atomic number 45na white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum
atomic number 46na 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 jewelry
atomic number 47na soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal; occurs in argentite and in free form; used in coins and jewelry and tableware and photography
atomic number 48na soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores
atomic number 49na rare soft silvery metallic element; occurs in small quantities in sphalerite
atomic number 5na trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder
atomic number 50na 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 oxide
atomic number 51na metallic element having four allotropic forms; used in a wide variety of alloys; found in stibnite
atomic number 52na 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 gold
atomic number 53na 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)
atomic number 54na colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts
atomic number 55na soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal
atomic number 56na soft silvery metallic element of the alkali earth group; found in barite
atomic number 57na white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
atomic number 58na ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group
atomic number 59na soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process
atomic number 6nan abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds
atomic number 60na yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium
atomic number 61na soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium
atomic number 62na grey lustrous metallic element of the rare earth group; is used in special alloys; occurs in monazite and bastnasite
atomic number 63na bivalent and trivalent metallic element of the rare earth group
atomic number 64na ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group
atomic number 65na metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
atomic number 66na trivalent metallic element of the rare earth group; forms compounds that are highly magnetic
atomic number 67na trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds
atomic number 68na trivalent metallic element of the rare earth group; occurs with yttrium
atomic number 69na 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 xenotime
atomic number 7na 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 tissues
atomic number 70na soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime
atomic number 71na trivalent metallic element of the rare earth group; usually occurs in association with yttrium
atomic number 72na grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
atomic number 73na hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite
atomic number 74na heavy grey-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite
atomic number 75na rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum
atomic number 76na hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known
atomic number 77na heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
atomic number 78na heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits
atomic number 79na soft yellow malleable ductile (trivalent and univalent) metallic element; occurs mainly as nuggets in rocks and alluvial deposits; does not react with most chemicals but is attacked by chlorine and aqua regia
atomic number 8na 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 crust
atomic number 80na heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures
atomic number 81na 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 ores
atomic number 82na soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull grey
atomic number 83na heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals
atomic number 84na 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 reactor
atomic number 85na highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
atomic number 86na 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 health
atomic number 87na radioactive element of the alkali-metal group discovered as a disintegration product of actinium
atomic number 88nan intensely radioactive metallic element that occurs in minute amounts in uranium ores
atomic number 89na radioactive element of the actinide series; found in uranium ores
atomic number 9na nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
atomic number 90na soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands
atomic number 91na short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
atomic number 92na heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
atomic number 93na radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium
atomic number 94na 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
atomic number 95na radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms
atomic number 96na radioactive transuranic metallic element; produced by bombarding plutonium with helium nuclei
atomic number 97na radioactive transuranic element; discovered by bombarding americium with helium
atomic number 98na radioactive transuranic element; discovered by bombarding curium with alpha particles
atomic number 99na radioactive transuranic element produced by bombarding plutonium with neutrons
atomic physicsnthe branch of physics that studies the internal structure of atomic nuclei
atomic pilena nuclear reactor that uses controlled nuclear fission to generate energy
atomic powernnuclear energy regarded as a source of electricity for the power grid (for civilian use)
atomic reactorna nuclear reactor that uses controlled nuclear fission to generate energy
atomic spectrumn(physics) a spectrum of radiation caused by electron transitions within an atom; the series of spectrum lines is characteristic of the element
atomic theoryn(chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles
atomic theoryna theory of the structure of the atom
atomic warheadnthe warhead of a missile designed to deliver an atom bomb
atomic weightn(chemistry) the ratio of the atomic mass of an element to half the atomic mass of carbon
  

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