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...eights of the elements|standard atomic weight]] of 227 g•mol⁻¹ and it is a [[solid]] in its elemental form. ...cal (unit)|Pa]], it has a [[boiling point]] of 3,198 °[[Celsius (unit)|C]] and a [[melting point]] of 1,051 °C.

{{r|Complementary and alternative medicine}} {{r|History of homeopathy}}

...r chemists, however, work on problems related to [[medicine]], [[biology]] and [[biochemistry]], or [[materials science]]. == Basic concepts in polymer chemistry ==

|iupac= see Chemistry ...that is believed to function in the same way that [[sildenafil]] (Viagra®) and [[vardenafil]] (Levitra®) work, despite significant structural differences

* Norman E. Holden. (2001) History of the Origin of the Chemical Elements and Their Discoverers. Prepared for the 41st IUPAC General Assembly in Brisbane ...emical Elements: Their Discovery and the Origins of their Names.] A useful and interesting article.

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*{{cite book|author=Stan Gibilisco and Norman H. Crowhurst|title= Mastering Technical Mathematics|edition=3rd Edit *{{cite book|author=Robert C. Weast (Editor)|title=Handbook of Chemistry and Physics|edition=56th Edition|publisher=CRC Press|year=1975|id=ISBN 0-87819-

...in her husband's magnum opus ''Traité élémentaire de Chemie'' and edited and published her husband's posthumous ''Mémoires de Physique et de Chimique'' ...T. Eagle and J. Sloan, ''Marie Anne Paulze Lavoisier: The Mother of Modern Chemistry'', The Chemical Educator vol. '''3''' (1998) [http://www.springerlink.com/c

...d cGMP levels relax the smooth muscles, dilate the [[corporeal sinusoid]]s and increase blood flow enabling an erection. cGMP levels are normally increas == Chemistry ==

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...result of laboratory (e.g., clinical chemistry, hematology, microbiology) and [[medical imaging|imaging]] tests. Often, syndromic diagnosis proceeds step A syndrome is a set of manifestations, and, at least in the preliminary phases of diagnosis, there can be different [[

...oking: The Science and Lore of the Kitchen]]'' initially published in 1984 and revised in 2004.<ref>[http://www.npr.org/templates/story/story.php?storyId= ...the [[Denver Museum of Nature and Science|Denver Natural History Museum]] and the [[Fermi National Accelerator Laboratory]]. {{citation needed|date=Janua

{{r|Philosophy of chemistry}} {{r|History of Science}}

...d Museum of Fine Arts in Boston. His research background is in [[physical chemistry]] ...eutchdiversity>[http://www.jewishworldreview.com/cols/chavez030205.asp "PC and the CIA", jewishworldreview.com, Mar. 2, 2005]</ref>

...lue?mp|search_for=proton+mass |publisher=[[National Institute of Standards and Technology]] |accessdate=2011-03-28}} ...|search_for=elementary+charge |publisher=[[National Institute of Standards and Technology]] |accessdate=2011-03-28}}

...itution reaction]]s, [[pericyclic reaction]]s, [[rearrangement reaction]]s and [[organic redox reaction|redox reactions]]. In [[organic synthesis]], organ ...912, the [[Diels-Alder reaction]] in 1950, the [[Wittig reaction]] in 1979 and [[olefin metathesis]] in 2005.

**Detailed history of the periodic system, lacking discussion of the role of modern physics in **Detailed history of the periodic system, one of the few such histories.

...ments ''Y'' and ''Z'', say &mdash; can form multiple different [[Compound (chemistry)|compounds]], the ratio of the weights of any one of the elements in the di ...rams of carbon combines with 13.3 grams of oxygen to form carbon monoxide, and 26.6 grams of oxygen to form carbon dioxide, the ratio 13.3:26.6 = 1:2 for

'''Planetology''' is the study of other planets, those in our solar system and those beyond it. It is also referred to as '''planetary science'''. Given t ...the Earth has been influenced to some extent by the activities of humanity and this influence has made little or no impact on other planets.