Valence bond theory — In chemistry, valence bond theory explains the nature of a chemical bond in a molecule in terms of atomic valencies. [Murrel, JN, Kettle, SF Tedder, JM The Chemical Bond , John Wiley Sons (1985) ISBN 0 471 90759 6] Valence bond theory summarizes… … Wikipedia
Modern valence bond theory — is the term used to describe applications of valence bond theory with computer programs that are competitive in accuracy and economy with programs for the Hartree Fock method and other molecular orbital based methods. The latter methods dominated … Wikipedia
structure des liaisons de valence — valentinių ryšių sandara statusas T sritis fizika atitikmenys: angl. valence bond structure vok. Valenzstruktur, f rus. структура валентных связей, f pranc. structure des liaisons de valence, f … Fizikos terminų žodynas
Valence (chemistry) — For other uses, see Valence (disambiguation). In chemistry, valence, also known as valency or valence number, is a measure of the number of bonds formed by an atom of a given element. Valence can be defined as the number of valence bonds[1] a… … Wikipedia
Bond valence method — The bond valence method (or bond valence sum) (not to be mistaken for the valence bond theory in quantum chemistry) is a popular method in coordination chemistry to estimate the oxidation states of atoms.The basic idea is that the valence V of an … Wikipedia
Chemical bond — A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electromagnetic force attraction between opposite charges, either between electrons and… … Wikipedia
valence — /vay leuhns/, n. 1. Chem. a. the quality that determines the number of atoms or groups with which any single atom or group will unite chemically. b. the relative combining capacity of an atom or group compared with that of the standard hydrogen… … Universalium
Valence — /vann lahonns /, n. a city in and the capital of Drôme, in SE France. 70,307. * * * Number of bonds (see bonding) an atom can form. Hydrogen (H) always has valence 1, so other elements valences equal the number of hydrogen atoms they combine with … Universalium
valence electron — Chem. an electron of an atom, located in the outermost shell (valence shell) of the atom, that can be transferred to or shared with another atom. [1925 30] * * * any of the fundamental negatively charged particles in the outermost region of … Universalium
Covalent bond — Covalent redirects here. For other uses, see Covalent (disambiguation). A covalent bond forming H2 (right) where two h … Wikipedia