covalent valence

См. также в других словарях:

• covalent — 1929, from covalence (1919), from CO (Cf. co ) + VALENCE (Cf. valence) …   Etymology dictionary

• Covalent bond — Covalent redirects here. For other uses, see Covalent (disambiguation). A covalent bond forming H2 (right) where two h …   Wikipedia

• Valence electron — In chemistry, valence electrons are the electrons contained in the outermost, or valence , electron shell of an atom. Valence electrons are important in determining how an element reacts chemically with other elements: The fewer valence electrons …   Wikipedia

• 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

• 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

• covalent bond — Bond Bond (b[o^]nd), n. [The same word as band. Cf. {Band}, {Bend}.] 1. That which binds, ties, fastens, or confines, or by which anything is fastened or bound, as a cord, chain, etc.; a band; a ligament; a shackle or a manacle. [1913 Webster]… …   The Collaborative International Dictionary of English

• Covalent radius of fluorine — The covalent radius of fluorine is a measure of the size of a fluorine atom; it is approximated at about 60 picometres. Since fluorine is a relatively small atom with a large electronegativity, its covalent radius is difficult to evaluate. The… …   Wikipedia

• covalent bond — Chem. the bond formed by the sharing of a pair of electrons by two atoms. [1960 65] * * * Force holding atoms in a molecule together as a specific, separate entity (as opposed to, e.g., colloidal aggregates; see bonding). In covalent bonds, two… …   Universalium

• valence — va·lence vā lən(t)s n 1 a) the degree of combining power of an element or radical as shown by the number of atomic weights of a monovalent element (as hydrogen) with which the atomic weight of the element or the partial molecular weight of the… …   Medical dictionary

• 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 — kovalentinis ryšys statusas T sritis chemija apibrėžtis Ryšys, atsirandantis dėl kelių atomų valentinių elektronų orbitalių sanklotos. atitikmenys: angl. covalent bond; valence bond rus. атомная связь; ковалентная связь ryšiai: sinonimas –… …   Chemijos terminų aiškinamasis žodynas