(a)
Interpretation:
The percentage of isotope remaining after 60 days is to be determined.
Concept Interpretation:
The process of radioactive decay is how an unstable atomic nucleus loses energy through radiation. A substance that has unstable nuclei is regarded as radioactive.
(a)
Answer to Problem 61A
Around
Explanation of Solution
Finding the value of
Therefore, about
(b)
Interpretation:
Amount of radioactive samples remaining after 40 days is to be determined.
Concept Interpretation:
The process of radioactive decay is how an unstable atomic nucleus loses energy through radiation. A substance that has unstable nuclei is regarded as radioactive.
(b)
Answer to Problem 61A
Around
Explanation of Solution
Finding the value of
Therefore, about
(c)
Interpretation:
Time required to decay 44 g to 4.4 g is to be determined.
Concept Interpretation:
The process of radioactive decay is how an unstable atomic nucleus loses energy through radiation. A substance that has unstable nuclei is regarded as radioactive.
(c)
Answer to Problem 61A
Approximately
Explanation of Solution
We must first determine the percentage of thorium-
As a result,
Next, find the number of days it took for the decay by using the radioactive decay curve on the graph.
We can deduce from the graph that it took roughly
(d)
Interpretation:
Half-life is to be determined.
Concept Interpretation:
The process of radioactive decay is how an unstable atomic nucleus loses energy through radiation. A substance that has unstable nuclei is regarded as radioactive.
(d)
Answer to Problem 61A
Approximately
Explanation of Solution
To address the issue, we will use the equation shown below:
where
We have given:
The half-life of thorium-
Chapter 25 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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