P7 - Radioactivity Flashcards
1
Q
What does a radioactive substance contain?
A
an unstable nuclei that becomes stable by emitting radiation
2
Q
3 main types of radiation?
A
α - Alpha
β - Beta
γ - Gamma
3
Q
Most penetrating radiation?
A
Gamma
4
Q
Least penetrating Radiation?
A
Alpha
5
Q
How does a Geiger counter work?
A
It clicks each time a particle of radiation enters the tube
6
Q
Who discovered alpha and beta radiation?
A
Ernest Rutherford
7
Q
Energy is released in a nuclear reactor because of…
A
nuclear fission
8
Q
Nuclear fission =
A
the splitting of an atoms nucleus into 2 smaller nuclei and the release of 2 or 3 neautrons and energy
