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Valence   /vˈeɪləns/   Listen
noun
Valence  n.  (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. 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.






Collaborative International Dictionary of English 0.48








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"Valence" Quotes from Famous Books



... Jerome proceeded at once to tell her why we came, yet I noted in all his confidences he ever kept something to himself for safety's sake. The maid's reappearance interrupted us. She announced, "M. de Valence." ...
— The Black Wolf's Breed - A Story of France in the Old World and the New, happening - in the Reign of Louis XIV • Harris Dickson

... foreigners.] The king having married Eleanor, daughter of the Count of Provence [u], was surrounded by a great number of strangers from that country, whom he caressed with the fondest affection, and enriched by an imprudent generosity [w]. The Bishop of Valence, a prelate of the house of Savoy, and maternal uncle to the queen, was his chief minister, and employed every art to amass wealth for himself and his relations. Peter of Savoy, a brother of the same family, was invested in the honour of Richmond, and received the rich wardship of Earl Warrenne: ...
— The History of England, Volume I • David Hume

... famous Hotel Bourgtheroulde there, its Pierre de Saulbeaux, and all that legion of architects and builders who were employed by the Cardinal Amboise in his castle of Gaillon,—of Tours, with its Pierre Valence, its Francois Marchant, its Viart and Colin Byart, out of whose rich and picturesque craft-spirit arose the quaint fancies of the palaces of Blois and Chambord, and the playfulness of many an old Flemish house-front. Such a Renaissance ...
— Atlantic Monthly, Volume 8, Issue 45, July, 1861 • Various

... river in the SE. of France, which gives name to a dep. (572), and which, after a course of 180 m. falls into the Rhone near Valence. ...
— The Nuttall Encyclopaedia - Being a Concise and Comprehensive Dictionary of General Knowledge • Edited by Rev. James Wood

... Valentine, which he had used as cardinal, and still continued to employ with the title of Count, although he had resigned the archbishopric which gave him the name, he there and then bestowed an him the investiture of Valence, in Dauphine, with the title of Duke and a pension of 20,000 francs; then, when he had made this magnificent gift and talked with him for nearly a couple of hours, he took his leave, to enable him to prepare the splendid entry he was proposing ...
— The Borgias - Celebrated Crimes • Alexandre Dumas, Pere


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