Interpretation: To predict the sample of radioisotope after one half-life and two half-lives.
Concept Introduction: Half-life is the time needed for half the nuclei in a radioactive sample to decay into products. It is denoted by
Answer to Problem 12LC
After one half-life, the sample of radioisotope that remains is 50 while after two half-lives, it is 25.
Explanation of Solution
The equation that is used to calculate the amount of isotope that remains in a radioactive sample can be given as follows:
Here,
If initially the amount of radioisotope is 100, then after one half-life, the remaining amount of radioisotope can be calculated as follows taking
The amount of radioisotope after one half-life is 50.
If initially the amount of radioisotope is 100, then after two half-lives, the remaining amount of radioisotope can be calculated as follows taking
The amount of radioisotope after one half-life is 25.
After one half-life, the sample of radioisotope that remains is 50 while after two half-lives, it is 25.
Chapter 25 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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