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mole (chemistry) mole (chemistry)
mole in chemistry, a quantity of particles of any type equal to Avogadro's number, or 6.02×10 23 particles. One gram-molecular weight of any molecular substance contains exactly one mole of molecules. The term mole is often used in place of gram-molecular weight; e.g., one speaks of 18... Read more
inorganic chemistry inorganic chemistry
inorganic chemistry the study of all the elements and their compounds with the exception of carbon and its compounds, which fall under the category of organic chemistry . Inorganic chemistry investigates the characteristics of substances that are not organic, such as nonliving matter and minerals... Read more
Richard Zsigmondy Richard Zsigmondy
ZSIGMONDY, RICHARD ADOLF(b. Vienna Austria, 1 April 1865;d. Göttingen, Germany, 24 September 1929)colloidal chemistry.Zsigmondy was a figure of paramount importance on colloid chemistry during the first quarter of the twentieth century. His receipt of the Nobel Prize in 1925, for invention of the... Read more
Peter Joseph Wilhelm Debye Peter Joseph Wilhelm Debye
Peter Joseph Wilhelm Debye , 1884-1966, American physicist, b. the Netherlands. He was professor at the universities of Zürich, Utrecht, Göttingen, Leipzig, and Berlin. In 1940 he came to the United States and served as professor of chemistry at Cornell Univ. (1940-52). For his work on the... Read more
atomic mass unit atomic mass unit
atomic mass unit or amu, in chemistry and physics, unit defined as exactly 1/12 the mass of an atom of carbon-12, the isotope of carbon with six protons and six neutrons in its nucleus. One amu is equal to approximately 1.66 × 10 -24 grams.... Read more
William Ramsay William Ramsay
RAMSAY, WILLIAM (b. Glasgow, Scotland, 2 October 1852; d. Hazlemere [near High Wycombe], Buckinghamshire, England, 23 July 1916) physical chemistry. Ramsay is best known for his discovery and isolation of the family of inert gases of the atmosphere. For this experimental work, along with the... Read more
Gerhard Herzberg Gerhard Herzberg
HERZBERG, GERHARD(b. Hamburg, Germany, 25 December 1904; d. Ottawa, Ontario, Canada, 3 March 1999), spectroscopy, chemistry, physics, astrophysics.Herzberg was a seminal and prolific spectroscopist active for over sixty years in Germany, the United States, and most importantly, in Canada. His career... Read more
Green chemistry Green chemistry
Green Chemistry Green chemistry is also known as environmentally benign chemistry, or sustainable chemistry. Perhaps the most widely accepted definition of green chemistry is the one offered by chemists Paul Anastas and John Warner, who defined green chemistry as the design... Read more
Cecilia Helena Payne-Gaposchkin Cecilia Helena Payne-Gaposchkin
PAYNE-GAPOSCHKIN, CECILIA HELENA(b. Wendover, Buckinghamshire, United Kingdom, 10 May 1900; d. Cambridge, Massachusetts, 7 December 1979), astrophysics.Payne was born to a family with genealogical and intellectual connections to the intelligentsia of England. A box of letters she had inherited from... Read more
chemistry chemistry
chemistry branch of science concerned with the properties, composition, and structure of substances and the changes they undergo when they combine or react under specified conditions. Branches of Chemistry Chemistry can be divided into branches according to either the substances studied or the... Read more

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