Radioactive decay and Nuclear Radiation Flashcards
1
Q
Unstable atoms are ?
A
Atoms that have too many or too few neutrons.
2
Q
Unstable atoms emit what to become more what?
A
- radiation
- stable
Repeat whole sentence outloud
3
Q
Unstable atoms emit radiation to become more stable. What is this process called?
A
Radioactive decay
4
Q
The rate at which a unstable nuclei emits radiation is known as?
A
Activity
5
Q
What is activity measured in?
A
Becquerel
6
Q
What can u measure activity with a ?
Suggest an example
A
- detector
- Geiger Muller tube
7
Q
The number of decays recorded each second is known as the?
A
Count rate
8
Q
ALPHA
- ionising power =
- penetrating power (stopped by) =
A
- high ionsing power
- least penetrating power - stopped by paper or skin
9
Q
BETA
- ionising power =
- penetrating power (stopped by) =
A
- low ionising power
- middle penetrating power - stopped by thin sheet of aluminium foil
10
Q
GAMMA
- ionising power =
- penetrating power (stopped by) =
A
- very low ionising power
- most penetrating - stopped by thick layer of lead/concrete
