radiocarbon dating carbon dating carbon- dating | a chemical analysis used to determine the age of organic materials based on their content of the radioisotope carbon-, believed to be reliable up to , years |
carbon carbon copy | a copy made with carbon paper |
carbon arc lamp carbon arc | has carbon electrodes |
hydrogen bomb H-bomb fusion bomb thermonuclear bomb | a nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium |
tetrachlorethylene tetrachloroethylene ethylene tetrachloride carbon dichloride | anthelmintic agent used against hookworm and other nematodes |
hydrogen ion concentration | the number of moles of hydrogen ions per cubic decimeter |
carbon process | a process of printing on paper coated with bichromated gelatin containing pigment |
hydrogen ion | a positively charged atom of hydrogen, that is to say, a normal hydrogen atomic nucleus |
hydrogen bond | a chemical bond consisting of a hydrogen atom between two electronegative atoms (e.g., oxygen or nitrogen) with one side be a covalent bond and the other being an ionic bond |
carbon cycle | a thermonuclear reaction in the interior of stars |
carbon cycle | the organic circulation of carbon from the atmosphere into organisms and back again |
respiratory acidosis carbon dioxide acidosis | acidosis resulting from reduced gas exchange in the lungs (as in emphysema or pneumonia), excess carbon dioxide combines with water to form carbonic acid which increases the acidity of the blood |
carbon monoxide poisoning | a toxic condition that results from inhaling and absorbing carbon monoxide gas, carbon monoxide combines with hemoglobin and displaces oxygen in the blood |
hydrazoic acid azoimide hydrogen azide HN | a colorless explosive liquid that is volatile and poisonous and foul-smelling |
hydrogen cyanide | a highly poisonous gas or volatile liquid that smells like bitter almonds, becomes a gas at arounddegree Fahrenheit and is most dangerous when inhaled, the anhydride of hydrocyanic acid, used in manufacturing |
carbon nanotube nanotube | a fullerene molecule having a cylindrical or toroidal shape |
carbon C atomic number | an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond, occurs in all organic compounds |
carbon atom | an atom of carbon |
radiocarbon carbon | a radioactive isotope of carbon |
hydrogen H atomic number | 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 |
hydrogen atom | an atom of hydrogen |
acidic hydrogen acid hydrogen | a hydrogen atom in an acid that forms a positive ion when the acid dissociates |
deuterium heavy hydrogen | an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen) |
bicarbonate hydrogen carbonate | a salt of carbonic acid (containing the anion HCO) in which one hydrogen atom has been replaced, an acid carbonate |
bicarbonate of soda sodium hydrogen carbonate sodium bicarbonate baking soda saleratus | a white soluble compound (NaHCO) used in effervescent drinks and in baking powders and as an antacid |
hydrogen peroxide peroxide | a viscous liquid with strong oxidizing properties, a powerful bleaching agent, also used (in aqueous solutions) as a mild disinfectant and (in strong concentrations) as an oxidant in rocket fuels |
carbon black lampblack soot smut crock | a black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink |
activated carbon activated charcoal | powdered or granular carbon used for purifying by adsorption, given orally (as a slurry) it is an antidote for some kinds of poisons |
carbon dioxide CO carbonic acid gas | a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances, absorbed from the air by plants in photosynthesis |
carbon disulfide | a toxic colorless flammable liquid (CS), used in the manufacture of rayon and cellophane and carbon tetrachloride and as a solvent for rubber |
carbon monoxide carbon monoxide gas CO | an odorless very poisonous gas that is a product of incomplete combustion of carbon |
carbon paper carbon | a thin paper coated on one side with a dark waxy substance (often containing carbon), used to transfer characters from the original to an under sheet of paper |
carbon tetrachloride carbon tet tetrachloromethane perchloromethane | a colorless nonflammable liquid used as a solvent for fats and oils, because of its toxicity its use as a cleaning fluid or fire extinguisher has declined |
carbon tetrahalide | compounds composed of carbon and halogen molecules |
carbon steel | steel whose characteristics are determined by the amount of carbon it contains |
potassium bicarbonate potassium acid carbonate potassium hydrogen carbonate | a crystalline salt (KHCO) that is used in baking powder and as an antacid |
hydrogen bromide | a colorless gas that yields hydrobromic acid in solution with water |
hydrogen chloride | a colorless corrosive gas (HCl) |
hydrogen fluoride | a colorless poisonous corrosive liquid made by the action of sulphuric acid on calcium fluoride, solutions in water are hydrofluoric acid |
hydrogen iodide | a colorless gas that yields hydroiodic acid in aqueous solution |
hydrogen sulfide | a sulfide having the unpleasant smell of rotten eggs |
cream of tartar tartar potassium bitartrate potassium hydrogen tartrate | a salt used especially in baking powder |
hydrogen-bomb | attack with a hydrogen bomb |