Half Life Flashcards
(9 cards)
1
Q
What is half life?
A
Half life is the time taken for the number of radioactive nuclei in an isotope to halve
2
Q
Is radioactivity a random process?
A
Yes
3
Q
Where do radioactive substances give out radiation from?
A
The nuclei of their atoms
4
Q
What can radiation be measured with?
A
A Geiger muller tube and counter
5
Q
Is radioactive decay random?
A
Yes
6
Q
What is activity measured in?
A
Becquerels (Bq)
7
Q
1 Bq is equal to what?
A
1 decay per second
8
Q
Each time a radioactive nucleus decay is to become a stable nucleus, what decreases?
A
The activity. Older sources emit less radiation.
9
Q
What does a short half-life mean?
A
A short half-life means the activity falls quickly because the nuclei are very unstable
