The activity of a radioactive substance depends on
A
temperature and purity
B
temperature and age
C
purity and age
D
age, purity and temperature
E
none of the above
Verified Correct Answer: E.
Physical Principles & Numerical Solution
Radioactive decay is a nuclear process; therefore, it is not affected by Temperature, Pressure, Chemical state, or purity.
Even if impurities are present, they do not change the decay rate of the radioactive nuclei.
Therefore, Activity depends on the half-life/decay constant and the quantity of radioactive atoms present.
Source: Myschool Past Questions Archive (Record #29133)