Radioactivity Flashcards
1
Q
Which type of radiation is the most ionising?
A
Alpha
2
Q
Which type of radiation is the leat ionising?
A
Gamma
3
Q
What type of radiation can be stopped by a approximately 5 cm of air?
A
Alpha radiation
4
Q
What type of radiation can be stopped by a approximately 1 m of air?
A
Beta radiation
5
Q
Name the instrument used to detect radioactivity
A
Geiger counter
6
Q
When does radioactive decay occur?
A
When the nucleus of an isotope is unstable
