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单词 valency
释义

Definition of valency in English:

valency

nounPlural valencies ˈveɪl(ə)nsiˈveɪlənsi
British Chemistry
  • 1The combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with.

    〔化〕〈主英〉化合价

    carbon always has a valency of 4

    碳元素的化合价总是4.比较VALENCE 1

    Compare with valence
    Example sentencesExamples
    • It is well-known that aggregation can be induced by changes in pH, the salt concentration, valency of ions, or the polarity of the solvent.
    • The higher the valency of the counterions, the more significant is the reversal of the effective charge of the aggregates.
    • Plutonium has five different crystal-type conditions or ‘phases’ that it can be in, and has five possible valencies.
    • The degree of flocculation, and hence randomness of particle orientations on sedimentation, generally increases with the concentration and valency of the cations in the solution.
    • Depending on the charges of additional groups that may be bound to the phosphate group, phospholipids in water can have a valency between - 2 and + 1, and also neutral groups are possible.
    1. 1.1Linguistics The number of grammatical elements with which a particular word, especially a verb, combines in a sentence.
      〔语言学〕价
      ‘give’ has a valency of three in ‘I (1) gave it (2) to him (3)’
      Example sentencesExamples
      • The purpose of this paper is to study the factors involved in the changing valency of the reflexes of ABHORRERE / ABHORRESCERE in Castilian, ie aborrir ~ aburrir and aborre cer.

Origin

Early 17th century: from late Latin valentia 'power, competence', from valere 'be well or strong'.

Definition of valency in US English:

valency

nounˈvālənsēˈveɪlənsi
British Chemistry
  • another term for valence
    Example sentencesExamples
    • The higher the valency of the counterions, the more significant is the reversal of the effective charge of the aggregates.
    • Depending on the charges of additional groups that may be bound to the phosphate group, phospholipids in water can have a valency between - 2 and + 1, and also neutral groups are possible.
    • The degree of flocculation, and hence randomness of particle orientations on sedimentation, generally increases with the concentration and valency of the cations in the solution.
    • It is well-known that aggregation can be induced by changes in pH, the salt concentration, valency of ions, or the polarity of the solvent.
    • Plutonium has five different crystal-type conditions or ‘phases’ that it can be in, and has five possible valencies.

Origin

Early 17th century: from late Latin valentia ‘power, competence’, from valere ‘be well or strong’.

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