Valence

Valence or valency may refer to:

==Science== 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 Degree (graph theory), also called the valency of a vertex in graph theory Valency (linguistics), aspect of verbs relative to other parts of speech Valence (psychology) or hedonic tone, the (emotional) value associated with an event, object or situation