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Concept explainers
Interpretation:
Decay product of Americium-241 by alpha emission and amount of americium-241 left after radioactive decay for an elapsed time of 1000 yearsshould be determined.
Concept Introduction:
Radioactive decay is a process wherein a less stable radioactive nuclei form a more stable nuclei by loss of energy. This can be achieved by the loss of gain of elementary particles such as alpha, beta or positron particles. Alpha particles are nothing but a Helium nuclei (42 He). When a nucleus undergoes an alpha emission process, which is a type of elementary radioactive particle, the resulting product nuclei will have an
Radioactive decays follow first-order reaction kinetics.
For a first-order reaction the equation is:
where,
[A]t = concentration of substrate at time ‘t’.
[A]o = initial concentration of substrate at time ‘t=0’.
t = elapsed time.
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Chapter 9 Solutions
Introduction to General, Organic and Biochemistry
- A sample of rock was found to contain 8.23 mg of rubidium-87 and 0.47 mg of strontium-87.. (a) Calculate the age of the rock if the half-life of the decay of rubidium by emission is 4.71010 y. (b) If some S3887r was initially present in the rock, would the rock be younger, older, or the same age as the age calculated in (a)? Explain your answer.arrow_forwardTechnetium-99m has a half-life of 6.01 hours. If a patient injected with technetium-99m is safe to leave the hospital once 75% of the dose has decayed, when is the patient allowed to leave?arrow_forward
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