Valence


Valence
Valence Va"lence, n. [From L. valens, -entis, p. pr. of valere to have power, to be strong. See {Valiant}.] (Chem.) The degree of combining power of an atom (or radical) as shown by the number of atoms of hydrogen (or of other monads, as chlorine, sodium, etc.) with which it will combine, or for which it can be substituted, or with which it can be compared; thus, an atom of hydrogen is a monad, and has a valence of one; the atoms of oxygen, nitrogen, and carbon are respectively dyads, triads, and tetrads, and have a valence respectively of two, three, and four. [1913 Webster]

Note: The valence of certain elements varies in different compounds. Valence in degree may extend as high as seven or eight, as in the cases of iodine and osmium respectively. The doctrine of valence has been of fundamental importance in distinguishing the equivalence from the atomic weight, and is an essential factor in explaining the chemical structures of compounds. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • VALENCE — À toute représentation de la matière qui la suppose grenue, se rattachent deux genres d’intuitions, l’une privilégiant les formes, l’autre les forces. On peut, en effet, imaginer sous le mode de l’intensité les interactions entre les particules… …   Encyclopédie Universelle

  • Valence CF — Valencia Club de Fútbol Généralités Surnom(s) …   Wikipédia en Français

  • Valence FC — Valence CF Valencia Club de Fútbol Généralités Surnom(s) …   Wikipédia en Français

  • Valence — may refer to:In molecules, atoms, or subatomic particles* Valence (chemistry) * Valence bond theory in chemistry * Valence shell in chemistry * Valence band in physics * Valence quarks (see quark model) in particle physics In other sciences*… …   Wikipedia

  • Valence — Valence …   Deutsch Wikipedia

  • Valence — puede referirse a varias localidades de Francia: Valence, comuna francesa y prefectura del departamento de Drôme; llamada también Valence sur Rhône y antiguamente en español Valencia de Francia. Valence, comuna francesa del departamento de… …   Wikipedia Español

  • Valence HB — Valence Handball Généralités …   Wikipédia en Français

  • VALENCE — VALENCE, chief town of the department of Dôme, S.E. France, part of the ancient province of Dauphiné. The establishment of the Jewish community in Valence does not go back earlier than 1323; however, the decision of the council held in the town… …   Encyclopedia of Judaism

  • valence — n. pl. valencies [vā′ləns] n. [LL valentia, worth, capacity < L, vigor < valens, prp. of valere, to be strong: see VALUE] Chem. 1. the capacity of an element or radical to combine with another to form molecules, as measured by the number of …   English World dictionary

  • Valence —   [va lãs], Stadt in Südfrankreich, Verwaltungssitz des Départements Drôme, an der mittleren Rhône unterhalb der Isèremündung, 63 400 Einwohner; Bischofssitz; Kunstmuseum; landwirtschaftliches Handelszentrum in einem Obstbaugebiet; Maschinen und… …   Universal-Lexikon