heavy hydrogen


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Related to heavy hydrogen: tritium

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.

heavy hydrogen

See deuterium.

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 acid
CAS # 7783-06-4

sulfurated hydrogen

Hydrogen sulfide

hydrogen

a chemical element, atomic number 1, atomic weight 1.00797, symbol H. See Table 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 bonding
weak electrostatic attraction between one electronegative atom and the hydrogen atom covalently linked to a second electronegative atom.
hydrogen breath test
detects hydrogen production as a product of bacterial fermentation of carbohydrates, an indicator of inflammatory bowel disease or carbohydrate malabsorption.
hydrogen cyanide
hydrocyanic acid.
heavy hydrogen
hydrogen having double the mass of ordinary hydrogen; deuterium.
hydrogen ion balance
hydrogen ion concentration
the degree of concentration of hydrogen ions (the acid element) in a solution. Its symbol is pH, and 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 indicates acidity, above 7 indicates alkalinity. See also acid-base balance and ph.
hydrogen peroxide
H2O2, used in solution as an antibacterial agent. A 3% solution foams on touching skin or mucous membrane and appears to have a mechanical cleansing action.
hydrogen peroxide-based teat dips
hydrogen sulfide
an ill-smelling, colorless, poisonous gas, H2S; much used as a chemical reagent. Hydrogen sulfide is often present in gases from oil wells and from manure vats under slatted floor barns. Poisoning of cattle causes diarrhea, dehydration, dyspnea and death in convulsions. The feces are black and the breath smells of hydrogen sulfide. Called also hydrosulfuric acid. See also manure pit gas poisoning.
hydrogen swell
defective canned meat can. Can is distended due to production of hydrogen as a result of corrosion of the can surface.
References in periodicals archive ?
The IEC fusion generator produces millions of neutrons per second through the fusion of heavy hydrogen atoms to helium, the process which maintained the sun's energy for billions of years.
The wire cage vaporizes, collapsing inward and radiating X-rays toward a sesame-seed-size capsule of heavy hydrogen.
There, scientists zapped clusters of atoms of deuterium, or heavy hydrogen, with brief but extremely powerful laser pulses.
researchers who measured the ratio of heavy hydrogen, or deuterium, to ordinary hydrogen in water in Comet Hale-Bopp.
The target typically consists of a vapor of heavy hydrogen isotopes (tritium and deuterium) encased in plastic.