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The valence electrons

См. также в других словарях:

  • valence electrons — n. the orbital electrons in the outermost shell of an atom which largely determine its properties * * * …   Universalium

  • valence electrons — n. the orbital electrons in the outermost shell of an atom which largely determine its properties …   English World dictionary

  • valence electrons — valency electrons or valence electrons plural noun Those of the outermost shell of the atom, largely responsible for its chemical and physical properties • • • Main Entry: ↑valency …   Useful english dictionary

  • 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 band — noun The highest range of electron energies in an insulator or semiconductor that can be populated; it corresponds to the valence electrons of the constituent atoms …   Wiktionary

  • valence shell — noun : the outermost shell of an atom containing the valence electrons …   Useful english dictionary

  • 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

  • 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

  • Électrons de valence — Couche de valence  Ne doit pas être confondu avec Valence (chimie). La couche de valence (ou couche périphérique) d un atome est sa dernière couche électronique, c’est à dire la plus éloignée du noyau. Elle est caractérisée par le nombre… …   Wikipédia en Français

  • Valence band — In solids, the valence band is the highest range of electron energies where electrons are normally present at absolute zero. In semiconductors and insulators, there is a band gap above the valence band, followed by a conduction band above that.… …   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

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