Half-life Flashcards
1
Q
What is the unit for measuring radioactivity?, what does it mean?
A
Becquerel (Bq)
1 Bq means one nucleus decaying per second
2
Q
The radioactivity of a sample always [ ] over time
A
decreases
3
Q
The [ ] a sample becomes, the less radiation it will emit
A
older
4
Q
What is a half-life?
A
A HALF-LIFE is the AVERAGE time it takes for the NUMBER of NUCLEI in a radioactive isotope sample to HALVE
5
Q
A short half life means the activity falls [ ]
A
quickly
6
Q
A half life is always the same period of time for a sample!
A
Did you know that?!!
7
Q
The half-life is found from the graph by finding the [ ] interval on the x axis corresponding to [ ] the activity on the y axis
A
time
halving
