TERMIUM Plus®

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

ACTINIUM [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 - external organization data 2011-08-26

English

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

A radioactive trivalent metallic element resembling lanthanum in chemical properties formed by alpha radiation from protactinium and found especially in pitchblende.

OBS

Symbol: Ac.

OBS

First member of the actinide series; atomic number 89; atomic weight 227 (most stable isotope); use: radioactive tracer (225 isotope).

French

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

Élément radioactif faisant partie du groupe des actinides.

OBS

C'est l'un des produits de la désintégration de l'uranium 235. Numéro atomique 89, nombre de masse 227.

OBS

On en connaît deux isotopes naturels, Ac 227 et Ac 228, et 22 isotopes artificiels de masse atomique comprise entre 209 et 232.

OBS

Nombre de masse 227, de poids atomique chimique 227,035.

Spanish

Campo(s) temático(s)
  • Química
  • Compartimiento - Comisión Canadiense de Seguridad Nuclear
  • Física atómica
DEF

Elemento químico radiactivo, de símbolo Ac, número atómico 89, y configuración electrónica (Rn)6d17s2, con 11 nucleidos, ninguno estable. La masa atómica del isótopo menos inestable es 227.0278. Es elemento metálico.

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Record 2 2001-01-12

English

Subject field(s)
  • Chemistry
  • Atomic Physics
CONT

Polonium-215 (half-life: 1.78 milliseconds); alpha decay.

Key term(s)
  • Po 215
  • Po-215
  • Ac A
  • Ac-A

French

Domaine(s)
  • Chimie
  • Physique atomique
DEF

Radioélément de période d'une durée de 1,83 x 10-3 seconde.

Key term(s)
  • polonium-215
  • actinium-A
  • Po 215
  • Po-215
  • Ac A
  • Ac-A

Spanish

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