| 单词 | univalent |
| 例句 | Me, I was always just Hazel, univalent Hazel. The Fault in Our Stars 2012-01-10T00:00:00Z The system, which he named univalent foundations, was the main topic of study at the Institute for Advanced Study for a year, in 2012–13. Vladimir Voevodsky (1966–2017) Though it’s known as Siwa today, prior to the fifthteenth century, it was called Ammonium--which probably sounds like a place filled with the univalent chemical ion NH4+ --and it sort of was. Save The Date: Preventing Heirloom Date Palm Extinction in Egypt's Siwa Oasis 2015-11-17T05:00:00Z Monoxide, mo-nok′sīd, n. an oxide containing a single oxygen atom in combination with two univalent atoms or one bivalent atom. Chambers's Twentieth Century Dictionary (part 2 of 4: E-M) 2012-01-11T03:00:23.770Z An atom with an extra corpuscle is a univalent negative ion, an atom with one corpuscle detached is a univalent positive ion. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z Glycerine, being a trihydric alcohol, has three atoms of hydrogen which are replaceable by three univalent radicals of the higher members of the fatty acids, e. g., Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. First spermatocyte, anaphase, showing elongated centrosome and diverging univalent chromosomes. Studies in Spermatogenesis Part II Figures 18b, 19, 20, and 21 show various stages in the contraction of these split bivalent chromosomes to form diamond-shaped tetrads, each side of which is a univalent daughter chromosome. Studies in Spermatogenesis Part I These compounds, when dissolved in water, dissociate in such a way as to form simple, univalent metallic ions which are colorless. An Elementary Study of Chemistry This charge is very near that which the study of the phenomena of ordinary electrolysis leads us to attribute to a univalent atom produced by electrolytic dissociation. The New Physics and Its Evolution There is strong cumulative evidence that all such particles possess the same charge, which is identical with that associated with a univalent atom in electrolytic liquids. Darwin and Modern Science If M. is ambivalent, his sister B. M. is univalent. The Foundations of Personality Elements such as oxygen, calcium, and zinc, which can combine with two atoms of hydrogen or other univalent elements, are said to be divalent. An Elementary Study of Chemistry In one series the metals are univalent and the salts have formulas like those of the sodium salts. An Elementary Study of Chemistry A number of other elements are like hydrogen in being able to combine with at most one atom of other elements, and such elements are called univalent. An Elementary Study of Chemistry The group therefore acts as a univalent metal. An Elementary Study of Chemistry These elements, however, combine with other univalent elements, such as chlorine, and their valence can be determined from the compounds so formed. An Elementary Study of Chemistry A divalent element, on the other hand, will combine with two atoms of a univalent element. An Elementary Study of Chemistry Silver forms only one series of salts, being always a univalent metal. An Elementary Study of Chemistry A trivalent atom will combine with three atoms of a univalent element, as in the compound III III H3N. An Elementary Study of Chemistry Thus, in the general reaction between an acid and a base, the essential action is between the univalent hydrogen ion and the univalent hydroxyl ion. An Elementary Study of Chemistry As will be shown later in the chapter, the group NH4 in this compound acts as a univalent radical and is known as ammonium. An Elementary Study of Chemistry The elements of the group are univalent in their compounds with hydrogen and the metals. An Elementary Study of Chemistry Copper, like iron, forms two series of compounds: in the cuprous compounds it is univalent; in the cupric it is divalent. An Elementary Study of Chemistry |
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