A convenient source of gamma rays for radiation chemistry research is 60Co, which undergoes the following decay process: 60_27Co ? 60_28Ni + ?^- + ?. The half-life of 60Co is 1.9 × 10^3 days. What is the rate constant for the decay process? How long will it take for a sample of 60Co to decay to half of its original concentration?
Added by Catalina Q.
Close
Step 1
We are given the half-life of 60Co, which is 1.9 \times 10^3 days. We need to find the rate constant for the decay process. Show more…
Show all steps
Your feedback will help us improve your experience
Madhur L and 55 other Chemistry 101 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The initial disintegration rate for a sample containing 60Co as the only radioactive nuclide is 6740 dis/h. Part A How many years must this radioactive sample be maintained before the disintegration rate falls to 102 dis/min? The half-life of 60Co is 5.2 years. Express your answer using two significant figures.
Adi S.
Cobalt-60 $\left({ }^{60} \mathrm{Co}\right)$ is often used as a radiation source in medicine. It has a half-life of $5.25$ years. How long after a new sample is delivered will its activity have decreased $(a)$ to about one-eighth its original value? ( $b$ ) to about one-third its original value? Give your answers to two significant figures. The activity is proportional to the number of undecayed atoms $(\Delta N / \Delta t=\lambda N)$ (a) In each half-life, half the remaining sample decays. Because to decay to one-eighth its original strength. (b) Using the fact that the material present decreased by one-half during each $5.25$ years, we can plot the graph shown From it, we see that the sample decays to $0.33$ its original value after a time of about $8.3$ years.
Recommended Textbooks
Chemistry: Structure and Properties
Chemistry The Central Science
Chemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD