temperature and purity
temperature and age
purity and age
age, purity and temperature
none of the above
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The correct answer is **E. none of the above**. Here's why:
The activity of a radioactive substance, which is the number of disintegrations per second, or the number of unstable atomic nuclei that decay per second in a given sample, depends on the following factors:
- The **amount of the radioactive substance present**: The greater the number of radioactive nuclei present in the sample, the more will decay per unit of time.
- The **half-life** of the radioactive substance: The half-life is the time interval required for half the unstable nuclei to decay. Different nuclides have different half-lives.
External conditions, such as **temperature and pressure**, have **no effect** on the activity of a radioactive source. The spontaneous emission of radiation involves changes within the nucleus of each atom of the source.
So, the activity of a radioactive substance does not depend on temperature, purity, or age. Hence, the answer is E. none of the above.
radioactivity is independent of external control(new school physics page 477). so the answer is C
the activity is the rate of disintegration of a radioactive substance and it is dependent on the AGE which determines the number of atoms left in that substance and it also depends on PURITY which determines the actual amount of radioactive material present in a particular sample but is independent on temperature and pressure
So the correct option is C
Actually, The answer is E ..
It's ACTIVITY means the emission of particles so regardless of how pure or How old the radioactive element is....
it will definitely emit radioactive particles..
The activity of a radioactive substance is influenced by several key factors:
1. Its half-life: This is the time it takes for half of the radioactive nuclei in a sample to decay. Each radioactive isotope has its specific half-life that remains constant regardless of the amount of substance present or external conditions.
2. The amount of the substance present: The greater the number of radioactive nuclei, the more potential decays will occur over a given period. So, if you have a larger sample of a radioactive isotope, the overall activity will be higher.
3. The type of radiation emitted: Different isotopes emit different types of radiation (such as alpha, beta, or gamma radiation), and this can affect how the radiation interacts with other materials, as well as how it can be detected and measured.
Ai choose option c which is purity and age while you Option E which is none of the above
