hydrogen
The definitions used in this glossary of terminology either have been provided by the authors of the articles, or have been extracted wholly or in part, or paraphrased from the following sources: The American Medical Association Encyclopedia of Medicine, Charles B. Clayman, MD, Medical Editor, Random House, New York, 1989; Biotechnology from A to Z, 2d Edition, William Bains, Oxford University Press, New York, New York, 2002; A Dictionary of Genetics, 6th Edition, Robert C. King and William D. Stansfield, Oxford University Press, New York, New York, 2002; Dorland's Illustrated Medical Dictionary, 29th and 30th Editions, W. B. Saunders Company, Philadelphia, 2000, 2003; Genes VII, Benjamin Lewin, Oxford University Press, New York, New York, 2000; The Gale Encyclopedia of Genetic Disorders, Volumes I and II, Stacey L. Blachford, Ed., Thomson Learning, New York, New York, 2002; The Merriam-Webster Dictionary, Merriam-Webster, Inc., Springfield, Massachusetts, 1997; Molecular Biology of the Cell, 3rd Edition, Bruce Alberts, et al., Garland Publishing, 1994; The Random House Dictionary of the English Language, Unabridged Edition, 1966; Webster's Ninth New Collegiate Dictionary, 1991.
DEFINITION:
- hydrogen
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The lightest element, an odorless, tasteless, colorless gas that is inflammable and explosive when mixed with air. It is found in water and in almost all organic compounds. Its ion is the active constituent of all acids in the water system. Its symbol is H; atomic number, 1; atomic weight, 1.00797; specific gravity, 0.069. Hydrogen exists in three isotopes: ordinary, or light, hydrogen is the mass 1 isotope, also called protium; heavy hydrogen is the mass 2 isotope, also called deuterium; the mass 3 isotope is tritium.
Used in 46 Term definitions
Used in 46 Term definitions