heavy hydrogen

hydrogen

(H) [hi´dro-jen] a chemical element, atomic number 1, atomic weight 1.00797. (See Appendix 6.) It exists as the mass 1 isotope (protium, or light or ordinary hydrogen), mass 2 isotope (deuterium, heavy hydrogen), and mass 3 isotope (tritium).hydrogen cyanide an extremely poisonous colorless liquid or gas, HCN, a decomposition product of various naturally occurring glycosides and a common cause of cyanide poisoning. Inhalation of the gas can cause death within a minute. Called also hydrocyanic acid.heavy hydrogen deuterium.hydrogen ion concentration the degree of concentration of hydrogen ions (the acid element) in a solution. Its symbol is pH, and it expresses the degree to which a solution is acidic or alkaline. The pH range extends from 0 to 14, pH 7 being neutral, a pH of less than 7 indicating acidity, and one above 7 indicating alkalinity. See also acid-base balance.hydrogen peroxide H₂O₂, an antiseptic with a mildly antibacterial action. A 3 per cent solution foams on touching skin or mucous membrane and appears to have a mechanical cleansing action.hydrogen sulfide H₂S, a poisonous gas with an offensive smell, released from decaying organic material, natural gas, petroleum, and sulfur deposits, and sometimes used as a chemical reagent.

hydrogen

(hi'dro-jen) [ hydro- + -gen] H A colorless, odorless, tasteless, gaseous chemical element, possessing one valence electron, atomic weight (mass) 1.0079, specific gravity 0.069, atomic number 1. A liter of the gas at sea level and at 0°C weighs 0.08988 g. There are three isotopes of hydrogen (protium, deuterium, and tritium), having atomic weights of approx. 1, 2, and 3, respectively. CAS # 1333-74-0

Occurrence

Hydrogen is present in the sun and stars. Even though it is the most abundant element in the known universe, its concentration in the earth's atmosphere is only 0.00005%. Hydrogen occurs in its free state (in natural gases and volcanic eruptions) only in minute quantities. It occurs principally on the earth as water (hydrogen oxide, H₂O) and is a constituent of all hydrocarbons. Hydrogen is present in all acids and in ionic form is responsible for the properties characteristic of acids. Hydrogen is present in nearly all organic compounds and is a component of all carbohydrates, proteins, and fats.

Uses

It is highly flammable and used in the oxyhydrogen flame in welding, in hydrogenation of oils for solidifying purposes, as a reducing agent, and in many syntheses.

hydrogen cyanide

Hydrocyanic acid.

hydrogen dioxide

Hydrogen peroxide.

heavy hydrogen

Deuterium.

hydrogen iodide

Hydriodic acid.

hydrogen peroxide

H₂O₂, a colorless syrupy liquid with an irritating odor and acrid taste. It decomposes readily, liberating oxygen. Because light is particularly effective in decomposing H₂O₂, it must be stored in tightly sealed glass jars in a dark place. Synonym: hydrogen dioxide

Uses

It is used as a commercial bleaching agent; as an oxidizing and reducing agent; and, in a 3% aqueous solution, as a mild antiseptic, germicide, and cleansing agent.

CAS # 7722-84-1

hydrogen sulfide

H₂S, a poisonous, flammable, colorless compound with a characteristic odor of rotten eggs. Synonym: sulfurated hydrogen Synonym: hydrosulfuric acidCAS # 7783-06-4

sulfurated hydrogen

Hydrogen sulfide

heavy hydrogen

heavy hydrogen

heavy hydrogen

heav′y hy′drogen

heav·y hydrogen

heavy hydrogen

heavy hydrogen

heavy hydrogen

hydrogen

hydrogen

Occurrence

Uses

hydrogen cyanide

hydrogen dioxide

heavy hydrogen

hydrogen iodide

hydrogen peroxide

Uses

hydrogen sulfide

sulfurated hydrogen

heavy hydrogen

Synonyms for heavy hydrogen

noun an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)

Synonyms

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