TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

CHEMICAL BOND [3 records]

Record 1 2011-08-22

English

Subject field(s)
  • Chemistry
DEF

An attractive force between atoms, ions or molecules which is strong enough to allow the combined aggregate to function as a unit.

OBS

Among the main types of bonds recognized, the metallic, covalent, ionic, and bridge bonds may be cited.

OBS

chemical bond: term standardized by ISO.

French

Domaine(s)
  • Chimie
DEF

Nom générique donné aux différentes interactions qui s'établissent au sein de la matière entre atomes, ions et molécules.

OBS

On distingue les liaisons métalliques, ioniques ou polaires, homopolaires ou covalentes, résiduelles ou de Van der Waals.

OBS

liaison chimique : terme normalisé par l'ISO.

Spanish

Save record 1

Record 2 2011-05-16

English

Subject field(s)
  • Biological Sciences
DEF

The strong attractive force that links two atoms of a chemical compound. The first explanations of the nature of these bonds were advanced by G.N. Lewis and W. Kossel. Two major types of bonds were proposed. 1. The ionic or electrovalent bond (following the transfer of one or more electrons from one atom to another to create ions). 2. The covalent bond (a bond that results when atoms share electrons). The central idea in their work on bonds is that atoms without electronic configurations of noble gases generally react in way that produces such configurations.

CONT

Enzymes act by binding together on their surfaces the potential partners of a chemical reaction, thus greatly speeding up the rates at which these reactants can collide and undergo a chemical reaction. In enzyme-catalyzed reactions, certain key atoms of the enzyme often directly participate by temporarily forming chemical bonds with the participating reagents (called enzyme substrates), thereby forming metastable chemical intermediates that have a heightened potential for chemical reactivity.

French

Domaine(s)
  • Sciences biologiques
DEF

Interactions d'origine électrique dues à la présence de charges positives et négatives (noyaux et électrons) au sein de ces atomes ou de ces ions.

CONT

Il est particulièrement important, du double point de vue doctrinal et pratique, de connaître les forces qui maintiennent ensemble l'édifice délicat d'une molécule protéinique. [...] Les liaisons chimiques, réalisées par une force d'attraction entre les atomes d'un aminoacide ou entre les atomes d'aminoacides différents, sont variées. Elles sont caractérisées par plusieurs paramètres, dont les plus importants sont la force, le rayon (reliant les centres des deux atomes), le degré de rotation des atomes entre lesquels la liaison s'établit et, dans certains cas, la spécificité. La rupture d'une liaison nécessite un apport d'énergie, dont la quantité est l'équivalent de l'énergie de la liaison. Plus cette énergie est élevée et plus courte est la distance entre les centres de deux atomes qui se combinent.

Spanish

Save record 2

Record 3 1976-06-19

English

Subject field(s)
  • Atomic Physics

French

Domaine(s)
  • Physique atomique

Spanish

Save record 3

Copyright notice for the TERMIUM Plus® data bank

© Public Services and Procurement Canada, 2024
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau

Features

Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.

Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: