chemical element

Noun
  1. 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 matter (synset 114647071)
    is a type of: substance - the real physical matter of which a person or thing consists
    subtypes:
    • allotrope - a structurally different form of an element
    • transuranic element - any element having an atomic number greater than 92 (which is the atomic number of uranium); all are radioactive
    • argonon, inert gas, noble gas - any of the chemically inert gaseous elements of the helium group in the periodic table
    • metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
    • nonmetal - a chemical element lacking typical metallic properties
    • transactinide - any of the artificially produced elements with atomic numbers greater than 103
    • ac, actinium, atomic number 89 - a radioactive element of the actinide series; found in uranium ores
    • ar, argon, atomic number 18 - a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
    • arsenic, as, atomic number 33 - 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
    • astatine, at, atomic number 85 - a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
    • atomic number 107, bh, bohrium, element 107 - a transuranic element
    • atomic number 5, b, boron - a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder
    • atomic number 35, br, bromine - a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water
    • atomic number 6, c, carbon - an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds
    • atomic number 17, chlorine, cl - 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)
    • atomic number 110, darmstadtium, ds, element 110 - a radioactive transuranic element
    • atomic number 105, db, dubnium, element 105, hahnium - a transuranic element
    • atomic number 9, f, fluorine - 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
    • atomic number 32, ge, germanium - a brittle grey crystalline element that is a semiconducting metalloid (resembling silicon) used in transistors; occurs in germanite and argyrodite
    • atomic number 108, element 108, hassium, hs - a radioactive transuranic element
    • atomic number 2, he, helium - 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)
    • atomic number 1, h, hydrogen - 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
    • atomic number 53, i, iodin, iodine - 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)
    • atomic number 36, kr, krypton - a colorless element that is one of the six inert gasses; occurs in trace amounts in air
    • atomic number 103, lawrencium, lr - a radioactive transuranic element synthesized from californium
    • atomic number 109, element 109, meitnerium, mt - a radioactive transuranic element
    • atomic number 101, md, mendelevium, mv - a 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 10, ne, neon - 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
    • atomic number 7, n, nitrogen - 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
    • atomic number 102, no, nobelium - a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known
    • atomic number 8, o, oxygen - 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
    • atomic number 15, p, phosphorus - 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
    • atomic number 94, plutonium, pu - 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
    • atomic number 86, radon, rn - a 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 111, element 111, rg, roentgenium - a radioactive transuranic element
    • atomic number 104, element 104, rf, rutherfordium, unnilquadium, unq - a radioactive transuranic element which has been synthesized
    • atomic number 106, element 106, seaborgium, sg - a transuranic element
    • atomic number 34, se, selenium - a 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 14, si, silicon - a 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 16, s, sulfur, sulphur - an 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 52, te, tellurium - a 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 112, element 112, ununbium, uub - a radioactive transuranic element
    • atomic number 116, element 116, ununhexium, uuh - a radioactive transuranic element
    • atomic number 115, element 115, ununpentium, uup - a radioactive transuranic element
    • atomic number 114, element 114, ununquadium, uuq - a radioactive transuranic element
    • atomic number 113, element 113, ununtrium, uut - a radioactive transuranic element
    • atomic number 54, xe, xenon - a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts
    • trace element - an element that occurs at very small quantities in the body but is nonetheless important for many biological processes
    has: atom - (physics and chemistry) the smallest component of an element having the chemical properties of the element
    same as: element

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