a. From the graph, determine the half-life of isotope 1 and the half-life of iso

Question

a. From the graph, determine the half-life of isotope 1 and the half-life of isotope 2.

b. At time t = 10 years, which isotope is decaying at the greater rate? Explain your reasoning

c. What type of radiation (alpha, beta, or gamma) would be most likely to escape through the container walls?

d. What characteristics of the type of radiation named in part (c) distinguish it from the other two?

e. After many years, when the container is removed, it is found to contain helium gas, and the total mass of the contents is found to have decreased. Account for each of these two observations

Explanation / Answer

a. From the graph, determine the half-life of isotope 1 and the half-life of isotope 2.
Ans. half-life of isotope 1 - 5 yr,
     half-life of isotope 2 - 10 yr
b. At time t = 10 years, which isotope is decaying at the greater rate?
Ans. isotope 1
c. What type of radiation (alpha, beta, or gamma) would be most likely to escape through the container walls?
Ans. gamma radiation
d. What characteristics of the type of radiation named in part (c) distinguish it from the other two?
Ans. No mass, No charge

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