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Look up: Ammonium

  1. Ammonium
    Ammonium is the basic radical of ammonium salts. It is comprised of one atom of nitrogen and four atoms of hydrogen.
    Found on http://www.encyclo.co.uk/nol.php

  2. ammonium
    [n] - the ion NH4 derived from ammonia
    Found on http://www.webdictionary.co.uk/definitio

  3. ammonium
    consisting of, or containing the monovalent group NH4- or the ion NH4+ Category: Chemistry • used in compound to fireproof clothing of foundry workers Category: Labour
    Found on http://www.mijnwoordenboek.nl/definition

  4. Ammonium
    Am·mo'ni·um noun [ See Ammonia .] (Chemistry) A compound radical, NH 4 , having the chemical relations of a strongly basic element like the alkali metals.
    Found on http://www.encyclo.co.uk/webster/A/71

  5. ammonium
    <chemistry> A compound radical, NH4, having the chemical relations of a strongly basic element like the alkali metals. ... See: Ammonia. ... Source: Websters Dictionary ... (01 Mar 1998) ...
    Found on http://www.mondofacto.com/facts/dictiona

  6. ammonium
    ammonium ion noun the ion NH4 derived from ammonia; behaves in many respects like an alkali metal ion
    Found on http://wordnet.princeton.edu/perl/webwn?

  7. Ammonium
    The `ammonium` cation is a positively charged polyatomic cation of the chemical formula NH4+. It has a molecular mass of 18.04 and is formed by protonation of ammonia (NH3). The resulting ion has a p`K`a of 9.25. Ammonium and `aminium` are also general names for positively charged or protonated substituted amines and quaternary ammonium cations N+R4, where one or more hydrogen atoms are replaced by organic radical groups (which could be symboliz...
    Found on http://en.wikipedia.org/wiki/Ammonium

  8. ammonium
    (ә-mo´ne-әm) a hypothetical radical, NH4, forming salts analogous to those of the alkaline metals. ammonium carbonate a mixture of ammonium compounds used as a liquefying expectorant in the treatment of chronic bronchitis and similar lung disorders. It is sometimes us...
    Found on http://www.mercksource.com/pp/us/cns/cns

  9. Ammonium
    • (n.) A compound radical, NH4, having the chemical relations of a strongly basic element like the alkali metals.
    Found on http://thinkexist.com/dictionary/meaning

  10. Ammonium
    NH4 Molar mass: 18.03846
    Found on http://www.convertunits.com/molarmass/Am

  11. ammonium
    The ion, NH4+, formed by combination of NH3 and H+ (the pKa value is 9.24); behaves as a univalent metal in forming ammonium compounds.
    Found on http://www.stedmans.com/section.cfm/45

  12. Ammonium
    Chemical compound composed of nitrogen and hydrogen (NH4). Component of the nitrogen cycle. Product of organic matter decomposition. Can be fixed to clay minerals and later exchanged.
    Found on http://www.physicalgeography.net/physgeo


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23 November 2009

This day in history:
At sixteen minutes past five on 23rd November 1963, a British television institution was born. Doctor Who would go on to become the longest-running science-fiction programme in the world, eventually spawning twenty six seasons of adventures from 1963 to 1989. In total, eight actors have played the part of Gallifrey's most famous Time Lord. From the very first - William Hartnell in 1963 - to the very last - Paul McGann, in the 1996 TV Movie - the Doctor has wandered through time and space in his trusty time machine, an old type-40 TARDIS (Time and Relative Dimensions in Space). Although appearing to be nothing more than a battered blue police box, it is in fact vastly bigger on the inside than on the outside, and always departs with its familiar wheezing, groaning sound. read more

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