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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



... figured in the French lines at Valmy, as a young and gallant officer, cool and sagacious beyond his years, and trusted accordingly by Kellerman and Dumouriez with an important station in the national army. The Duc de Chartres (the title he then bore) commanded the French right, General Valence was on the left, and Kellerman himself took his post in the centre, which was the strength and ...
— The Fifteen Decisive Battles of The World From Marathon to Waterloo • Sir Edward Creasy, M.A.

... seven leagues, I went to him on a small but active horse. On my arrival, I found him in bed, with a royal commissioner seated beside him, who was talking to him with great show of courtesy, while my uncle looked much wearied. The bishop of Valence was on the other side of his bed. Finding myself in such high company, I fell back, and awaited a better opportunity of ...
— Jacques Bonneval • Anne Manning

... war broke out between Count Bougars of Valence and Count Garin of Beaucaire; and Count Bougars besieged Beaucaire with a hundred knights and ten thousand men. Then Count Garin, who was old and feeble, said to his ...
— The World's Greatest Books, Vol. I • Various

... adroit, that is to say, less greedy, he would have continued to wait, and would only have hazarded that simple question, "Mother, can I eat the cake, now?" on their return to the University, to Master Andry Musnier's, Rue Madame la Valence, when he had the two arms of the Seine and the five bridges of the city between ...
— Notre-Dame de Paris - The Hunchback of Notre Dame • Victor Hugo

... overtone; resonating cavity; sounding board, tuning fork. [electrical resonance] tuning, squelch, frequency selection; resonator, resonator circuit; radio &c [chemical resonance] resonant structure, aromaticity, alternating double bonds, non-bonded resonance; pi clouds, unsaturation, double bond, (valence). V. resound, reverberate, reecho, resonate; ring, jingle, gingle^, chink, clink; tink^, tinkle; chime; gurgle &c 405; plash, goggle, echo, ring in the ear. Adj. resounding &c v.; resonant, reverberant, tinnient^, tintinnabulary; sonorous, booming, deep-toned, deep-sounding, deep-mouthed, ...
— Roget's Thesaurus of English Words and Phrases: Body • Roget


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