What does valence mean?
Valence most often refers to the combining capacity of an atom in chemistry. It describes how many chemical bonds an atom can form and, in modern usage, is also associated with the number of valence electrons involved in bonding. Carbon is the familiar example: its valence of four allows it to link with other carbon atoms in chains, rings, and complex networks, giving rise to a vast range of organic compounds. The term is also used in linguistics for the number and kinds of grammatical elements with which a word can combine, such as the arguments or complements taken by a verb. More generally, though much less frequently, valence can mean attractiveness or compelling quality. It derives from a Latin vocabulary associated with strength and worth. In British English, valency is often preferred for the chemical concept, while valence remains common in American usage.
nounIn chemistry, valence is the combining capacity of an atom, determined by the number of electrons it can gain, lose, or share in forming chemical bonds. More generally and in specialized linguistic use, it can refer to attractive quality or to the number and kinds of grammatical elements with which a word can combine.
- In chemistry, the combining capacity of an atom or ion, including the number and kinds of bonds it can form.
- In linguistics, the number or set of grammatical elements with which a word or construction can combine.
- In general literary usage, the quality of something being attractive, appealing, or compelling.
"Carbon has a valence of four, allowing it to form diverse molecular structures."
"Oxygen typically has a valence of two, so it commonly forms two bonds with other atoms."
"In linguistic analysis, the verb has a high valence because it can take several different complements."
The plural is standard but uncommon, since valence is usually discussed as a singular mass-like technical term.
"The valences of the different elements help determine the structures of their compounds."
Carbon's valence of four helps explain why it can form chains, rings, and three-dimensional networks, making it the architectural foundation of much of the chemistry of life.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does valence come from?
Valence comes from Latin valentia, meaning strength or worth, which was based on valens, “strong” or “vigorous,” from valere, “to be strong” or “to be worth.” English borrowed the term through the Romance-language tradition and later established it firmly in chemical terminology. Its relatives include valency, valiant, valour, and valor, all reflecting the same Latin root concerned with strength or worth.
How valence is actually used
Valence is standard technical vocabulary in chemistry, especially in American English; British usage often prefers valency for the chemical sense. The linguistic sense is specialized and technical, while the general sense meaning attractiveness is uncommon and literary.
Easily confused with valence
Valence and valency are closely related terms, but valency is more common in British chemical usage, whereas valence is widely used in American English and in some British contexts.