Chemistry

Gate Chemistry

chemistry is science who studies the composition and them reactions matter.

There is not clearly definite border between and chemistry, but, is generally regarded as concerning chemistry, the phenomena caused by reactions between the components of the matter and involving a modification of connections between atoms. According to the nature of these connections, these phenomena imply between the atoms of the exchanges or poolings ofelectrons, or many electrostatic forces.

Levels ofenergy put in?uvre in the chemical phenomena make that only the outer-shell electrons are concerned. Beyond, one enters plasma physics, even in with the implication of atomic nucleus.

On scales lower than that of the atom, the study of elementary particles and their interactions concerns .

The principal disciplines of chemistry are:

physical chemistry (or general chemistry), whose object is the study of the physical laws of the systems and processes chemical; its principal fields of study include/understand: thermochemistry, chemical kinetics (or chemical mechanics), itelectrochemistry, radiochemistry ;
analytical chemistry, whose object is the analysis of materials in order to determine and include/understand their chemical composition and their structure;
, concerning the description and the study of carbon and the organic compounds;
inorganic chemistry, concerning the description and the study of the chemical elements and the inorganic compounds.

History

to see the detailed article: History of chemistry

See also the articles alchemy and discovered chemical elements, as well as the biographies of the French and foreign scientists indexed in the articles: category: chemist or .

Basic concepts

acid - adsorption - alloy - ampholytic - atom - base (chemistry) - catalyst - ceramics - chemical compound - corrosion - oxidation step - dilution - chemical equation - electronegativity - hydrolize - ion - isotopes - - molecule - oxidant - oxydoreduction - pH - polymer - chemical reaction - reducer - plug

Chemistry and literature

The periodic System of Firstly Levi comprise blackjack chapters whose titles correspond to an element of table of Mendéléev, reporting the professional life of the writer, the autobiographical anecdotes or short news on the topic of chemistry.