nonmetal

1 sense of nonmetal Sense 1 nonmetal -- (a chemical element lacking typical metallic properties) -> chemical element, element -- (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) => allotrope -- (a structurally different form of an element; "graphite and diamond are allotropes of carbon") => transuranic element -- (any element having an atomic number greater than 92 (which is the atomic number of uranium); all are radioactive) => noble gas, inert gas, argonon -- (any of the chemically inert gaseous elements of the helium group in the periodic table) => metallic element, metal -- (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) => actinium, Ac, atomic number 89 -- (a radioactive element of the actinide series; found in uranium ores) => argon, Ar, 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) => bohrium, Bh, element 107, atomic number 107 -- (a transuranic element) => boron, B, atomic number 5 -- (a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder) => bromine, Br, atomic number 35 -- (a nonmetallic largely pentavalent heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water) => carbon, C, atomic number 6 -- (an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds) => chlorine, Cl, atomic number 17 -- (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)) => darmstadtium, Ds, element 110, atomic number 110 -- (a radioactive transuranic element) => dubnium, Db, hahnium, element 105, atomic number 105 -- (a transuranic element) => fluorine, F, atomic number 9 -- (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) => germanium, Ge, atomic number 32 -- (a brittle grey crystalline element that is a semiconducting metalloid (resembling silicon) used in transistors; occurs in germanite and argyrodite) => hassium, Hs, element 108, atomic number 108 -- (a radioactive transuranic element) => helium, He, atomic number 2 -- (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)) => hydrogen, H, atomic number 1 -- (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) => iodine, iodin, I, atomic number 53 -- (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)) => krypton, Kr, atomic number 36 -- (a colorless element that is one of the six inert gasses; occurs in trace amounts in air) => lawrencium, Lr, atomic number 103 -- (a radioactive transuranic element synthesized from californium) => meitnerium, Mt, element 109, atomic number 109 -- (a radioactive transuranic element) => mendelevium, Md, Mv, atomic number 101 -- (a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol)) => neon, Ne, atomic number 10 -- (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) => nitrogen, N, atomic number 7 -- (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) => nobelium, No, atomic number 102 -- (a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known) => oxygen, O, atomic number 8 -- (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) => phosphorus, P, atomic number 15 -- (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) => plutonium, Pu, atomic number 94 -- (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) => radon, Rn, atomic number 86 -- (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) => roentgenium, Rg, element 111, atomic number 111 -- (a radioactive transuranic element) => rutherfordium, Rf, unnilquadium, Unq, element 104, atomic number 104 -- (a radioactive transuranic element which has been synthesized) => seaborgium, Sg, element 106, atomic number 106 -- (a transuranic element) => selenium, Se, atomic number 34 -- (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)) => silicon, Si, atomic number 14 -- (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) => sulfur, S, sulphur, atomic number 16 -- (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)) => tellurium, Te, atomic number 52 -- (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) => ununbium, Uub, element 112, atomic number 112 -- (a radioactive transuranic element) => ununhexium, Uuh, element 116, atomic number 116 -- (a radioactive transuranic element) => ununpentium, Uup, element 115, atomic number 115 -- (a radioactive transuranic element) => ununquadium, Uuq, element 114, atomic number 114 -- (a radioactive transuranic element) => ununtrium, Uut, element 113, atomic number 113 -- (a radioactive transuranic element) => xenon, Xe, atomic number 54 -- (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)