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 |
hydrogen ion concentration | the number of moles of hydrogen ions per cubic decimeter |
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 |
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 |
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) |
arsine | a poisonous colorless flammable gas used in organic synthesis and to dope transistors and as a poison gas in warfare |
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 |
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 |