numéro atomique

Domaine: physiquephysique atomique et nucléaire
Date: 1987

Définition :

Numéro attribué à chaque élément dans la classification périodique des éléments.

Note :

Il est égal au nombre de charge.

Terme :

numéro atomique n. m.

Terme associé :

nombre atomique critiqué

Traductions

anglais
Date : 1987
Définition

The number of protons in the nucleus of an atom, and also its positive charge.

Notes :

This number represents the location of an element in the Periodic Table: it is always the same as the number of negatively charged electrons in the shells. Thus an atom is electrically neutral, except in an ionized state. Atomic number range from 1, for hydrogen, to 106, for the most recently discovered element which has not been named, as yet.

Elements are chemically classified by their atomic numbers.

Terme :
1. atomic number