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  2. Valence (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Valence_(chemistry)

    The valence is the combining capacity of an atom of a given element, determined by the number of hydrogen atoms that it combines with. In methane, carbon has a valence of 4; in ammonia, nitrogen has a valence of 3; in water, oxygen has a valence of 2; and in hydrogen chloride, chlorine has a valence of 1.

  3. Valence - Wikipedia

    en.wikipedia.org/wiki/Valence

    Valence (chemistry), a measure of an element's combining power with other atoms Valence electron, electrons in the outer shell of an atom's energy levels; Valence quarks, those quarks within a hadron that determine the hadron's quantum numbers

  4. Avalency - Wikipedia

    en.wikipedia.org/wiki/Avalency

    Valency refers to how many and what kinds of arguments a predicate licenses—i.e. what arguments the predicate selects grammatically. [1] Avalent verbs are verbs which have no valency , meaning that they have no logical arguments , such as subject or object .

  5. Valence electron - Wikipedia

    en.wikipedia.org/wiki/Valence_electron

    For a main-group element, the valence electrons are defined as those electrons residing in the electronic shell of highest principal quantum number n. [1] Thus, the number of valence electrons that it may have depends on the electron configuration in a simple way.

  6. Valency (linguistics) - Wikipedia

    en.wikipedia.org/wiki/Valency_(linguistics)

    Valency is related, though not identical, to subcategorization and transitivity, which count only object arguments – valency counts all arguments, including the subject. The linguistic meaning of valency derives from the definition of valency in chemistry. Like valency found in chemistry, there is the binding of specific elements.

  7. Valence (psychology) - Wikipedia

    en.wikipedia.org/wiki/Valence_(psychology)

    Valence, also known as hedonic tone, is a characteristic of emotions that determines their emotional affect (intrinsic appeal or repulsion). Positive valence corresponds to the "goodness" or attractiveness of an object, event, or situation, making it appealing or desirable.

  8. Degree (graph theory) - Wikipedia

    en.wikipedia.org/wiki/Degree_(graph_theory)

    A graph with a loop having vertices labeled by degree. In graph theory, the degree (or valency) of a vertex of a graph is the number of edges that are incident to the vertex; in a multigraph, a loop contributes 2 to a vertex's degree, for the two ends of the edge. [1]

  9. Periodic trends - Wikipedia

    en.wikipedia.org/wiki/Periodic_trends

    The valency of an element is the number of electrons that must be lost or gained by an atom to obtain a stable electron configuration. In simple terms, it is the measure of the combining capacity of an element to form chemical compounds .