That branch of science which treats of the composition of substances, and of the changes which they undergo in consequence of alterations in the constitution of the molecules, which depend upon variations of the number, kind, or mode of arrangement, of the constituent atoms. These atoms are not assumed to be indivisible, but merely the finest grade of subdivision hitherto attained. Chemistry deals with the changes in the composition and constitution of molecules. See Atom, Molecule.

An application of chemical theory and method to the consideration of some particular subject; as, the chemistry of iron; the chemistry of indigo.

Pariser - Pople - Parr computational quantum chemistry theory for approximating molecular orbitals. (R. Pariser and R.G. Parr, J. Chem. Phys. 21, 466, 767) (J.A. Pople, Trans. Faraday Soc. 49, 1375)

Study of magical, dangerous, and smelly phenomena.

It is the chemistry of a gem material which is ultimately responsible for all of its physical properties. Chemistry determines color which in turn determines value. Heat treatment is a chemical modification of a gem material to improve it?s color and value.

is used by the Steel Producer (SP) and Outside Processor (OP)/storage location to report chemical analysis for a given SP heat number.

American Chemical Society * Types of Alerts Frequency of Alerts Limits ASAD - As Soon As Publishable; these are articles on the web before they are assigned a volume/issue number daily or weekly None ToC as new issues become available SciFinderScholar Types of Alerts Frequency of Alerts Limits Not available Royal Society of Chemistry * Types of Alerts Frequency of Alerts Limits ToC as new issues become available None

The basic chemistry of water is hydrogen and oxygen, however unpurified water may also contain natural and human-made chemical pollutants.