Radioactive Decay
Chemistry ⇒ Nuclear Chemistry
Radioactive Decay starts at 10 and continues till grade 12.
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See sample questions for grade 12
A 100 g sample of a radioactive isotope decays to 25 g in 6 hours. What is its half-life?
A radioactive isotope decays with a half-life of 10 days. If you start with 200 mg, how much will remain after 30 days?
A radioactive isotope has a half-life of 4 days. If you start with 32 g, how much will remain after 12 days?
A radioactive sample has a decay constant of 0.231 day-1. Calculate its half-life in days.
A radioactive sample has an activity of 800 Bq. After 3 half-lives, what will its activity be?
A sample contains 80 g of a radioactive isotope with a half-life of 2 hours. How much of the isotope will remain after 6 hours?
Describe the change in atomic number and mass number during beta-minus decay.
Describe the main difference between alpha and beta decay.
Describe the process of positron emission in radioactive decay.
Explain the term 'parent' and 'daughter' nuclide in radioactive decay.
Explain why gamma rays are often emitted after alpha or beta decay.
Explain why some nuclei are unstable and undergo radioactive decay.
The equation N = N0e-λt describes the number of undecayed nuclei at time t. What does N0 represent?
What is radioactive decay?
Write the nuclear equation for the alpha decay of 238U.
