gaseous hydrogen
21hydrogen fluoride — n a colorless corrosive fuming usu. gaseous compound HF that yields hydrofluoric acid when dissolved in water * * * a corrosive inorganic acid, HF; see hydrofluoric acid …
22hydrogen — Symbol: H Atomic number: 1 Atomic weight: 1.0079 Colourless, odourless gaseous chemical element. Lightest and most abundant element in the universe. Present in water and in all organic compounds. Chemically reacts with most elements. Discovered… …
23hydrogen ion — ionized hydrogen of the form H+, found in aqueous solutions of all acids. [1895 1900] * * * ▪ chemistry strictly, the nucleus of a hydrogen atom separated from its accompanying electron. The hydrogen nucleus is made up of a particle… …
24hydrogen — n. Chem. a colourless gaseous element, without taste or odour, the lightest of the elements and occurring in water and all organic compounds. Usage: Symb.: H. Phrases and idioms: hydrogen bomb an immensely powerful bomb utilizing the explosive… …
25Gaseous fission reactor — A gas nuclear reactor (or gas fueled reactor ) limits the only temperature limiting materials in a reactor to the reactor walls. A limitation for conventional nuclear fission reactors is that if the nuclear fuel temperature were to rise too high… …
26hydrogen — 1. A gaseous element, atomic no. 1, atomic wt. 1.00794. 2. The molecular form (H2) of the element. SYN: dihydrogen. [hydro + G. gen, producing] activated h. h. removed by a dehydrogenase, e.g., via a …
27hydrogen sulfide — a colorless, flammable, water soluble, cumulatively poisonous gas, H2S, having the odor of rotten eggs: used chiefly in the manufacture of chemicals, in metallurgy, and as a reagent in laboratory analysis. Also called sulfureted hydrogen. [1870… …
28hydrogen — A colorless, odorless, tasteless, slightly water soluble, highly flammable gaseous element, the lightest of all gases and the most abundant element in the universe. The hot flame produced by a mixture of oxygen and hydrogen is used in welding …
29hydrogen cyanide — noun Date: 1869 1. a poisonous usually gaseous compound HCN that has the odor of bitter almonds 2. hydrocyanic acid …
30hydrogen fluoride — noun Date: 1869 a colorless corrosive fuming usually gaseous compound HF that yields hydrofluoric acid when dissolved in water …
