Definition of valence Valence

/vejˈlʌns/ - [veyluns] - Va•lence

We found 15 definitions of valence from 6 different sources.

What does valence mean?

Noun Plural: valences
valence - (biology) a relative capacity to unite or react or interact as with antigens or a biological substrate
		valency
		powerfulness, power possession of controlling influence; "the deterrent power of nuclear weapons"; "the power of his love saved her"; "his powerfulness was concealed by a gentle facade"
		biological science, biology the science that studies living organisms
		univalent used of a chromosome that is not paired or united with its homologous chromosome during synapsis; "a univalent chromosome"
		bivalent, double used of homologous chromosomes associated in pairs in synapsis
		multivalent having many values, meanings, or appeals; "subtle, multivalent allegory"
		monovalent having a valence of 1
valence - (chemistry) a property of atoms or radicals; their combining power given in terms of the number of hydrogen atoms (or the equivalent)
		valency
		powerfulness, power possession of controlling influence; "the deterrent power of nuclear weapons"; "the power of his love saved her"; "his powerfulness was concealed by a gentle facade"
		chemical science, chemistry the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions

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valence (Noun)
An extract; a preparation.
valence (Noun)
The combining capacity of an atom, radical or functional group determined by the number of electrons that it will lose, gain, or share when it combines with other atoms etc.
valence (Noun)
The number of binding sites of a molecule, such as an antibody or antigen.
valence (Noun)
The number of arguments that a verb can have, including the subject of the verb in the counting, ranging from zero for the likes of "It rains" to three for the likes of "He gives her a flower".
valence (Noun)
A one-dimensional value assigned to an object, situation, or state, that can usually be positive or negative.
valence (Noun)
value.
valence (Noun)
Alternative spelling of valance.

valence (n.)
The degree of combining power of an atom (or radical) as shown by the number of atoms of hydrogen (or of other monads, as chlorine, sodium, etc.) with which it will combine, or for which it can be substituted, or with which it can be compared; thus, an atom of hydrogen is a monad, and has a valence of one; the atoms of oxygen, nitrogen, and carbon are respectively dyads, triads, and tetrads, and have a valence respectively of two, three, and four.

valence
A measure of the number of chemical bonds formed by the atoms of a given element (source: Wikipedia).

Charente
Valence is a village in France, in Poitou-Charentes. It is near Angoulême. In 1999, 240 people lived there.
chemistry
In Chemistry, Valence (which is sometimes called valency) is the number of chemical bonds the atoms of a certain element can form.

For a long time, people though that this number was a fixed property of the element in question. Carbon always has four bonds, oxygen always has two, and hydrogen always has one. The problem was seen only later. Phosphorous sometimes behaves as if it had three bonds, a valence of three. At other times though, it seems to have five bonds.

IUPAC saw this problem, and proposed oxydation numbers. This means there is one number per chemical element. The problem of this approach is that it leaves aside most chemical properties of the elements in question.
Tarn-et-Garonne
Valence is a village in the Midi-Pyrénées region of France. It is in the department Tarn-et-Garonne. In 1999, about 4800 people lived there. Together with 23 other, similar villages, it formed the "Communauté de communes des Deux Rives". In that structure (that is, in all the villages together) there are about 15.500 people.

Valence is located 25 km from Agen, 45 km from Montauban, 60 km from Cahors, 90km from Toulouse and 160 km from Bordeaux