TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
UNSTABLE ATOM [5 records]
Record 1 - internal organization data 2011-12-14
Record 1, English
Record 1, Subject field(s)
- Atomic Physics
Record 1, Main entry term, English
- open shell
1, record 1, English, open%20shell
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Having an open shell means that one or more electrons in the outer shell of the element is(are) available to react with an external atom or molecule to establish a chemical bond and is therefore unstable. When a reaction fills an open shell or removes all of its valence electrons, it releases energy and the resulting product is at a lower energy level and more stable. 2, record 1, English, - open%20shell
Record 1, French
Record 1, Domaine(s)
- Physique atomique
Record 1, Main entry term, French
- molécule à couche d'électrons incomplète
1, record 1, French, mol%C3%A9cule%20%C3%A0%20couche%20d%27%C3%A9lectrons%20incompl%C3%A8te
feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - external organization data 2010-02-23
Record 2, English
Record 2, Subject field(s)
- Atomic Physics
- Compartment - Canadian Nuclear Safety Commission
Record 2, Main entry term, English
- unstable atom
1, record 2, English, unstable%20atom
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
Most ionizing radiation results when the structure of an atom's electrons, neutrons and protons breaks down. This can happen when some form of ionizing radiation collides with a normal atom, or when an unstable atom(called a radioisotope) decays or breaks down on its own. 1, record 2, English, - unstable%20atom
Record 2, French
Record 2, Domaine(s)
- Physique atomique
- Tiroir - Commission canadienne de sûreté nucléaire
Record 2, Main entry term, French
- atome instable
1, record 2, French, atome%20instable
masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
La plupart des rayonnements ionisants sont émis lorsque la structure des électrons, des neutrons et des protons d'un atome se fractionne. Cela peut se produire lorsque certains rayonnements ionisants se heurtent à un atome normal ou lorsqu'un atome instable, appelé «radio-isotope», se désintègre ou se fractionne de lui-même. 1, record 2, French, - atome%20instable
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - external organization data 2007-11-08
Record 3, English
Record 3, Subject field(s)
- Atomic Physics
- Compartment - Canadian Nuclear Safety Commission
Record 3, Main entry term, English
- atomic collision 1, record 3, English, atomic%20collision
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
This can happen from an atomic collision or when an unstable atom(called a radioisotope) decays or breaks down on its own. 1, record 3, English, - atomic%20collision
Record 3, French
Record 3, Domaine(s)
- Physique atomique
- Tiroir - Commission canadienne de sûreté nucléaire
Record 3, Main entry term, French
- collision d'atomes
1, record 3, French, collision%20d%27atomes
feminine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 CONT
Le rayonnement ionisant peut se produire lors d'une collision d'atomes, ou lorsqu'un atome instable (appelé radioisotope) se désintègre ou se divise en fragments. 1, record 3, French, - collision%20d%27atomes
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 2003-11-21
Record 4, English
Record 4, Subject field(s)
- Geochemistry
- Chronology
Record 4, Main entry term, English
- radioactive element
1, record 4, English, radioactive%20element
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 DEF
Applied to certain unstable atoms, the nuclei of which spontaneously disintegrate emitting particles and rays, eventually reverting through a series of such emissions into an atom having a stable nucleus and a different atomic number. 2, record 4, English, - radioactive%20element
Record number: 4, Textual support number: 1 CONT
Radioactive elements include radium, uranium, and a number of newly discovered, short-lived elements (as californium, berkelium, etc.). 3, record 4, English, - radioactive%20element
Record 4, French
Record 4, Domaine(s)
- Géochimie
- Chronologie
Record 4, Main entry term, French
- élément radioactif
1, record 4, French, %C3%A9l%C3%A9ment%20radioactif
correct, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 CONT
Beaucoup [de] roches contiennent d'infimes quantités des éléments dits radioactifs (uranium et thorium) qui, on le sait, sont instables et se désintègrent lentement selon un processus qui, au bout de milliards d'années, donne un produit final analogue au plomb ordinaire. 2, record 4, French, - %C3%A9l%C3%A9ment%20radioactif
Record 4, Spanish
Record 4, Campo(s) temático(s)
- Geoquímica
- Cronología
Record 4, Main entry term, Spanish
- elemento radiactivo
1, record 4, Spanish, elemento%20radiactivo
correct, masculine noun
Record 4, Abbreviations, Spanish
Record 4, Synonyms, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 1988-05-13
Record 5, English
Record 5, Subject field(s)
- Atomic Physics
Record 5, Main entry term, English
- excited level 1, record 5, English, excited%20level
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 CONT
When a certain amount of energy is applied to an atom, the energy level can be raised through absorption of energy. During this absorption of energy, an atom enters what is called an unstable, excited level. 1, record 5, English, - excited%20level
Record 5, French
Record 5, Domaine(s)
- Physique atomique
Record 5, Main entry term, French
- niveau excité
1, record 5, French, niveau%20excit%C3%A9
masculine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record number: 5, Textual support number: 1 CONT
Lorsqu'une certaine quantité d'énergie est appliquée à l'atome, le niveau d'énergie peut être élevé par une absorption d'énergie. Au cours de cette absorption d'énergie, l'atome atteint un niveau dit instable, c'est le niveau excité. 1, record 5, French, - niveau%20excit%C3%A9
Record 5, Spanish
Record 5, Textual support, Spanish
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