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standard iodine

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  • Iodine — (IPAEng|ˈaɪədaɪn, ˈaɪədɪn, or IPA|/ˈaɪədiːn/; from el. ιώδης iodes violet ), is a chemical element that has the symbol I and atomic number 53. Naturally occurring iodine is a single isotope with 74 neutrons. Chemically, iodine is the least… …   Wikipedia

  • iodine — /uy euh duyn , din/; in Chem. also /uy euh deen /, n. Chem. a nonmetallic halogen element occurring at ordinary temperatures as a grayish black crystalline solid that sublimes to a dense violet vapor when heated: used in medicine as an antiseptic …   Universalium

  • Iodine value — The iodine value (or iodine adsorption value or iodine number or iodine index ) in chemistry is the mass of iodine in grams that is consumed by 100 grams of a chemical substance. An iodine solution is yellow/brown in color and any chemical group… …   Wikipedia

  • Isotopes of iodine — There are 37 isotopes of iodine (I) and only one, 127I, is stable.In many ways, 129I is similar to 36Cl. It is a soluble halogen, fairly non reactive, exists mainly as a non sorbing anion, and is produced by cosmogenic, thermonuclear, and in situ …   Wikipedia

  • Primary standard — In metrology, a primary standard is a standard that is accurate enough that it is not calibrated by or subordinate to other standards. A primary standard in chemistry is a reliable, readily quantified substance. Features of a primary standard… …   Wikipedia

  • test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… …   Medical dictionary

  • Activated carbon — Activated carbon, also called activated charcoal, activated coal or carbo activatus, is a form of carbon that has been processed to make it extremely porous and thus to have a very large surface area available for adsorption or chemical reactions …   Wikipedia

  • Ozone — For other uses, see Ozone (disambiguation). Ozone …   Wikipedia

  • Metalloid —   13 14 15 16 17   2  B Boron …   Wikipedia

  • endocrine system, human — ▪ anatomy Introduction  group of ductless glands (gland) that regulate body processes by secreting chemical substances called hormones (hormone). Hormones act on nearby tissues or are carried in the bloodstream to act on specific target organs… …   Universalium

  • Ascorbic acid — This article is about the molecular aspects of ascorbic acid. For information about its role in nutrition, see Vitamin C. L Ascorbic acid …   Wikipedia

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