TERMIUM Plus®

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

structure atomique [1 record]

Record 1 - external organization data 2003-07-02

English

Subject field(s)
  • Atomic Physics
  • Chemistry
  • Energy (Physics)
  • Compartment - Canadian Nuclear Safety Commission
DEF

The arrangement of the parts of an atom, which consists of a massive, positively charged nucleous surrounded by a cloud of electrons arranged in orbits describable in terms of quantum mechanics.

CONT

Atomic structure and properties ... A more meaningful definition of "atom" can be made in terms of the internal structure, which has been well understood at least since 1927. In these terms the atom is the unit of matter that contains a small, dense, positively charged nucleus surrounded by sufficient negative electrons to make the whole electrically neutral. Structure. All atoms are about the same size, and this fact is a clue to the nature of their structure. The atomic diameter is about 2 X 10[superscript] -8 cm (2 hundred-millionths of a centimeter). Since this is only 1/1000 of the wavelength of visible light, atoms cannot be seen in the ordinary sense, even with microscope.

French

Domaine(s)
  • Physique atomique
  • Chimie
  • Énergie (Physique)
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

Structure de l'atome [...] L'atome est composé de trois éléments de base : le proton, le neutron et l'électron. Ils sont groupés en : a) Un noyau, très dense, où est concentrée presque toute la masse de l'atome, et qui est formé de nucléons de masses très voisines (1,66.10[exposant]-24g) [...] Ces nucléons sont les protons (P), portant une charge électrique positive (1,6.10[exposant]-19C), et les neutrons (N), sans charge électrique. b) Autour de ce noyau gravitent des électrons [...] en couches successives (K,L,M, ...); à chaque couche correspond un niveau d'énergie [...] La masse de l'électron est environ 1 850 fois plus faible que celle du proton. Le diamètre de l'atome est de l'ordre de 10[exposant]-8 cm, celui du noyau de 10[exposant]-12 cm, c'est-à-dire 10 000 fois plus petit.

OBS

On doit, en principe, dire «structure de l'atome». Toutefois, on parlera de la structure atomique de tel ou tel corps simple.

Spanish

Save record 1

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: