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1The combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with.‘carbon always has a valence of 4’
- ‘Addition reactions of inorganic molecules occur when an atom has more than one valence.’
- ‘Thus, the most obvious approach would be to use the Gouy-Chapman equation or its generalized formulation for electrolytes with mixed valences, the Grahame equation.’
- ‘The valence of a unit is closely tied up with its dependence.’
- ‘In covalent compounds the valence of an atom may be less obvious.’
- ‘One rather unsuccessful idea which he embarked on quite late in his career was to apply invariant theory to chemical valences.’
- 1.1[as modifier] Relating to or denoting electrons involved in or available for chemical bond formation.‘molecules with unpaired valence electrons’
- ‘The electrons in the highest energy level are called valence electrons.’
- ‘Oxygen has six valence electrons.’
- ‘The metalloids have an intermediate number of valence electrons.’
- ‘These superconductors usually contain more oxygen atoms than predicted by valence theory.’
- ‘Nonmetals with eight valence electrons are chemically unreactive.’
- 1.2Linguistics The number of grammatical elements with which a particular word, especially a verb, combines in a sentence.
- ‘Literature has reported valences of five and higher, but no substantiation of these has ever been shown.’
- ‘The valence of specific words and expressions communicates sexual potency and the lack thereof.’
- ‘The semantic valence attributed to a hieroglyphic language is two-edged.’
- ‘The authors compared the responses of 20 highs with 20 lows on ratings of the valence of neutral words that were preceded by subliminal presentations of negative or neutral images.’
Late Middle English: from late Latin valentia power, competence from valere be well or strong.
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