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valence

valence

1 8.9
The number of chemical bonds an atom can form
  • noun
  • /ˈveɪləns/
  • Specialized
translation icon : valencia
  • OK, so I look at the valence orbitals.
  • valence electrons
  • valence band
  • valence and conduction

So we had orbitals in MO theory, valence bond theory.

Examples

  • The number of valence electrons in an atom determines its bonding behavior with other elements.

  • And how many valence positions are there on nitrogen?

  • The localization is stronger in the valence band because of the greater effective mass of its states.

    Academic text (1994)
  • At that time in the U.S., Valence Bond Theory was the accepted way for chemists to explain bonding.

    Blog text (14)
  • And this outermost shell is termed the valence, the valence shell.

  • Now, why is it that the core orbitals didn't mix and the valence orbitals did mix?

  • The high-energy photons kick out core- or valence-shell electrons.

    Academic text (2004)
  • The energy offsets in the conduction and valence bands block injected holes and electrons from reaching the opposite electrode.

    Academic text (2006)
  • Atoms in the same group typically have the same number of valence electrons and similar reactivity.

  • In chemical reactions, the valence of an element indicates how many hydrogen atoms it can bond with.

Synonyms

valency
vsvalence
  • UK
9.5

The number of bonds an atom can form with other atoms

is measured by hydrogen equivalents rather than by number of bonds

Compounds

valence electron
  • Specialized
1 6.5

A tiny particle in the outer part of an atom that can join with other atoms

How Many

tetrasomy
  • Specialized
9.9
valence
  • Specialized
1 8.9
triunity
9.9
bivalence
  • Specialized
9.8

Surface Forms

valence singular
valences plural

Etymology

Valence comes from the Latin word valentia, from valere meaning 'to be strong', the same root you see in the English word value. Think of an atom's 'strength' or 'ability to join' with others — that's why in chemistry valence shows how many bonds an atom can make.