超铀元素
同一义项的词语：超铀元素
any element having an atomic number greater than 92 (which is the atomic number of uranium); all are radioactive
义项编号 14624191-n汉语开放词网 · 第390页
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惰性气体
同一义项的词语：惰性气体
any of the chemically inert gaseous elements of the helium group in the periodic table
义项编号 14624369-n氦基
同一义项的词语：氦基
the series of inert gases
义项编号 14624659-n镧系元素
同一义项的词语：镧系元素
any element of the lanthanide series (atomic numbers 57 through 71)
义项编号 14624743-n铽金属
同一义项的词语：铽金属
a separate group of related lanthanides, including terbium, europium, gadolinium, and sometimes dysprosium
义项编号 14624944-n锕类元素
同一义项的词语：锕类元素
(chemistry) a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium
义项编号 14625110-n稀土属元素
同一义项的词语：稀土属元素
the rare-earth elements with atomic numbers 57 through 71; having properties similar to lanthanum
义项编号 14625297-n金属、金属元素
any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
义项编号 14625458-n贵金属
同一义项的词语：贵金属
any metal that is resistant to corrosion or oxidation
义项编号 14627081-n非金属
同一义项的词语：非金属
a chemical element lacking typical metallic properties
义项编号 14627246-n超锕、超锕系元素
any of the artificially produced elements with atomic numbers greater than 103
义项编号 14627373-n金属络合染料
同一义项的词语：金属络合染料
acid dye in which the negative ion contains a chelated metal atom
义项编号 14627529-n锕
同一义项的词语：锕
a radioactive element of the actinide series; found in uranium ores
义项编号 14627655-n铝
同一义项的词语：铝
a silvery ductile metallic element found primarily in bauxite
义项编号 14627820-n明矾
同一义项的词语：明矾
a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
义项编号 14628119-n明矾
同一义项的词语：明矾
a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
义项编号 14628307-n镅
同一义项的词语：镅
a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms
义项编号 14628494-n锑
同一义项的词语：锑
a metallic element having four allotropic forms; used in a wide variety of alloys; found in stibnite
义项编号 14628668-n氩
同一义项的词语：氩
a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
义项编号 14628920-n砒、砷
a 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
义项编号 14629149-n砹
同一义项的词语：砹
a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
义项编号 14629561-n阿特拉津
同一义项的词语：阿特拉津
a synthetic compound derived from triazine that is widely used as an agricultural herbicide; "atrazine is thought to cause cancer and is banned in some European countries"
义项编号 14629772-n钡
同一义项的词语：钡
a soft silvery metallic element of the alkali earth group; found in barite
义项编号 14629998-n氧化钡
同一义项的词语：氧化钡
any of several compounds of barium
义项编号 14630204-n氢氧化钡
同一义项的词语：氢氧化钡
white poisonous crystals; made by dissolving barium oxide in water
义项编号 14630363-n氧化钡
同一义项的词语：氧化钡
an oxide of barium; a whitish toxic powder
义项编号 14630492-n过氧化钡
同一义项的词语：过氧化钡
a white toxic powder obtained by heating barium oxide in air
义项编号 14630630-n碱基对
同一义项的词语：碱基对
one of the pairs of chemical bases joined by hydrogen bonds that connect the complementary strands of a DNA molecule or of an RNA molecule that has two strands; the base pairs are adenine with thymine and guanine with cytosine in DNA and adenine with uracil and guanine with cytosine in RNA
义项编号 14630769-n锫
同一义项的词语：锫
a radioactive transuranic element; discovered by bombarding americium with helium
义项编号 14631134-n邵、铍
a light strong brittle grey toxic bivalent metallic element
义项编号 14631295-n铋
同一义项的词语：铋
a heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals
义项编号 14631502-n107号元素
同一义项的词语：107号元素
a transuranic element
义项编号 14631757-n硼
同一义项的词语：硼
a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder
义项编号 14631871-n溴
同一义项的词语：溴
a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water
义项编号 14632129-n镉
同一义项的词语：镉
a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores
义项编号 14632444-n钙
同一义项的词语：钙
a 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
义项编号 14632648-n锎
同一义项的词语：锎
a radioactive transuranic element; discovered by bombarding curium with alpha particles
义项编号 14633037-n碳
同一义项的词语：碳
an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds
义项编号 14633206-n碳原子
同一义项的词语：碳原子
an atom of carbon
义项编号 14633781-n放射性炭素、放射性碳
a radioactive isotope of carbon
义项编号 14633856-n铈
同一义项的词语：铈
a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group
义项编号 14633957-n铯
同一义项的词语：铯
a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal
义项编号 14634232-n铯
同一义项的词语：铯
a radioactive isotope of cesium used in radiation therapy
义项编号 14634477-n氯
同一义项的词语：氯
a 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)
义项编号 14634591-n射氯、放射性氯
a radioactive isotope of chlorine
义项编号 14634999-n铬
同一义项的词语：铬
a hard brittle multivalent metallic element; resistant to corrosion and tarnishing
义项编号 14635092-n钴
同一义项的词语：钴
a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
义项编号 14635290-n钴60
同一义项的词语：钴60
a radioactive isotope of cobalt with mass number 60; a source of exceptionally intense gamma rays; used in radiation therapy
义项编号 14635542-n铜
同一义项的词语：铜
a 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
义项编号 14635722-n锔
同一义项的词语：锔
a radioactive transuranic metallic element; produced by bombarding plutonium with helium nuclei
义项编号 14636220-n镝
同一义项的词语：镝
a trivalent metallic element of the rare earth group; forms compounds that are highly magnetic
义项编号 14636647-n锿
同一义项的词语：锿
a radioactive transuranic element produced by bombarding plutonium with neutrons
义项编号 14636822-n铒
同一义项的词语：铒
a trivalent metallic element of the rare earth group; occurs with yttrium
义项编号 14636988-n铕
同一义项的词语：铕
a bivalent and trivalent metallic element of the rare earth group
义项编号 14637176-n镄
同一义项的词语：镄
a radioactive transuranic metallic element produced by bombarding plutonium with neutrons
义项编号 14637339-n氟
同一义项的词语：氟
a 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
义项编号 14637507-n鍅、钫
a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
义项编号 14637864-n钆
同一义项的词语：钆
a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group
义项编号 14638041-n镓
同一义项的词语：镓
a rare silvery (usually trivalent) metallic element; brittle at low temperatures but liquid above room temperature; occurs in trace amounts in bauxite and zinc ores
义项编号 14638256-n锗
同一义项的词语：锗
a brittle grey crystalline element that is a semiconducting metalloid (resembling silicon) used in transistors; occurs in germanite and argyrodite
义项编号 14638517-n金、金子
a 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
义项编号 14638799-n铪
同一义项的词语：铪
a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
义项编号 14639556-n氦
同一义项的词语：氦
a 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)
义项编号 14639921-n钬
同一义项的词语：钬
a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds
义项编号 14640222-n氢、氢气
a 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
义项编号 14640434-n氢原子
同一义项的词语：氢原子
an atom of hydrogen
义项编号 14640756-n弱酸氢离子交换
同一义项的词语：弱酸氢离子交换
a hydrogen atom in an acid that forms a positive ion when the acid dissociates
义项编号 14640890-n氘
同一义项的词语：氘
an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)
义项编号 14641046-n铟
同一义项的词语：铟
a rare soft silvery metallic element; occurs in small quantities in sphalerite
义项编号 14641223-n碘
同一义项的词语：碘
a 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)
义项编号 14641397-n碘-131
同一义项的词语：碘-131
heavy radioactive isotope of iodine with a half-life of 8 days; used in a sodium salt to diagnose thyroid disease and to treat goiter
义项编号 14641797-n碘125
同一义项的词语：碘125
light radioactive isotope of iodine with a half-life of 60 days; used as a tracer in thyroid studies and as a treatment for hyperthyroidism
义项编号 14642005-n铱
同一义项的词语：铱
a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
义项编号 14642219-n铁
同一义项的词语：铁
a 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
义项编号 14642417-n氪
同一义项的词语：氪
a colorless element that is one of the six inert gasses; occurs in trace amounts in air
义项编号 14642916-n镧
同一义项的词语：镧
a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
义项编号 14643118-n铹
同一义项的词语：铹
a radioactive transuranic element synthesized from californium
义项编号 14643323-n铅
同一义项的词语：铅
a soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull grey; "the children were playing with lead soldiers"
义项编号 14643467-n锂
同一义项的词语：锂
a soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals
义项编号 14643793-n镏、镥
a trivalent metallic element of the rare earth group; usually occurs in association with yttrium
义项编号 14644063-n镁
同一义项的词语：镁
a 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)
义项编号 14644249-n锰
同一义项的词语：锰
a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals
义项编号 14644654-n钔
同一义项的词语：钔
a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol)
义项编号 14645092-n水银、汞
a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures
义项编号 14645346-n钼
同一义项的词语：钼
a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel
义项编号 14645661-n钕
同一义项的词语：钕
a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium
义项编号 14645882-n氖
同一义项的词语：氖
a 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
义项编号 14646152-n镎
同一义项的词语：镎
a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium
义项编号 14646403-n镍
同一义项的词语：镍
a hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite
义项编号 14646610-n铌
同一义项的词语：铌
a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium
义项编号 14646942-n钶
同一义项的词语：钶
a former name for niobium
义项编号 14647154-n氮
同一义项的词语：氮
a 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
义项编号 14647235-n氨、氮
an obsolete name for nitrogen
义项编号 14647623-n锘
同一义项的词语：锘
a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known
义项编号 14647722-n锇
同一义项的词语：锇
a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known
义项编号 14647907-n氧
同一义项的词语：氧
a 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
义项编号 14648100-n液态氧
同一义项的词语：液态氧
a bluish translucent magnetic liquid obtained by compressing gaseous oxygen and then cooling it below its boiling point; used as an oxidizer in rocket propellants
义项编号 14648526-n钯
同一义项的词语：钯
a 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
义项编号 14648754-n磷
同一义项的词语：磷
a 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
义项编号 14649197-n白金、铂
a 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
义项编号 14649543-n