electron transition
91Électrons de cœur — Électron de cœur Cet article court présente un sujet plus amplement développé ici : Liaison chimique et Orbitale atomique. En physique ou en chimie, on introduit l expression électron de cœur pour désigner les électrons dont on considère qu… …
92Électrons internes — Électron de cœur Cet article court présente un sujet plus amplement développé ici : Liaison chimique et Orbitale atomique. En physique ou en chimie, on introduit l expression électron de cœur pour désigner les électrons dont on considère qu… …
93transitionelement — transition element n. Any of the metallic elements that have an incomplete inner electron shell and that serve as transitional links between the most and the least electropositive in a series of elements. They are characterized by multiple… …
94spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …
95Marcus theory — is a theory originally developed by Rudolph A. Marcus, starting in 1956, to explain the rates of electron transfer reactions – the rate at which an electron can move or jump from one chemical species (called the electron donor) to another (called …
96ATOME — L’atome est le terme ultime de la division de la matière dans lequel les éléments chimiques conservent leur individualité. C’est la plus petite particule d’un élément qui existe à l’état libre ou combiné. On connaît 89 éléments naturels auxquels… …
97radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …
98coordination compound — Chem. complex (def. 10). Also called coordination complex. * * * ▪ chemistry Introduction any of a class of substances with chemical structures in which a central metal atom is surrounded by nonmetal atoms or groups of atoms, called ligands… …
99quantum mechanics — quantum mechanical, adj. Physics. a theory of the mechanics of atoms, molecules, and other physical systems that are subject to the uncertainty principle. Abbr.: QM Cf. nonrelativistic quantum mechanics, relativistic quantum mechanics. [1920 25]… …
100radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …
