P6.1.4 - Half-life Flashcards
1
Q
What is half-life?
A
The time it takes for the unstable nuclei to decay or for the activity to half
2
Q
What is the half life of helium-6?
A
0.8 seconds
3
Q
What is the half life of radon-222?
A
3.8 days
4
Q
What is the half life of carbon-14?
A
5700 years
5
Q
What is the half life of uranium-238?
A
4.5 billion years
6
Q
What is activity in half-life?
A
The number of decays per second
7
Q
What is the activity in half-life measured in?
A
Becquerels
