The activity of a radioactive sample drops from 800 counts/seconds to 200 counts/second in 24 hours.
The half life of the sample is:
8 hours.
3 hours.
24 hours.
12 hours.
Which of the following quantities are conserved in all nuclear reactions?
1) Electric charge
2) Number of nuclei
3) Number of protons
If 1 and 2 are correct.
If 3 only is correct.
If 1 and 3 are correct.
If 1 only is correct.
Which of the following graphs best illustrates the relationship between:
the number of undecayed atoms in a radioactive sample (y-axis) and the time (x-axis)?
C.
D.
A.
B.
