Radioactive Decay
Chemistry ⇒ Nuclear Chemistry
Radioactive Decay starts at 10 and continues till grade 12.
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See sample questions for grade 11
A 200 g sample of a radioactive isotope decays to 25 g in 4 days. What is its half-life?
A 50 g sample of a radioactive substance has a half-life of 2 hours. How much will remain after 8 hours?
A radioactive isotope has a half-life of 5 years. How many years will it take for a sample to decay to 1/16 of its original amount?
A radioactive sample decays to 25% of its original amount in 6 hours. What is its half-life?
A sample contains 80 mg of a radioactive isotope. If the half-life is 2 hours, how much will remain after 6 hours?
A scientist finds that a sample of 14C has decayed to 1/8 of its original amount. How many half-lives have passed?
Describe the difference between natural and artificial radioactive isotopes.
Describe the difference between parent and daughter isotopes in radioactive decay.
Describe what happens to the atomic number and mass number of a nucleus during gamma decay.
Describe what is meant by the term 'radioactive series'.
Explain why alpha particles are less penetrating than beta particles or gamma rays.
Explain why radioactive decay is considered a first-order kinetic process.
Explain why some nuclei are unstable and undergo radioactive decay.
If a radioactive isotope has a decay constant (λ) of 0.693 day-1, what is its half-life?
If a radioactive isotope has a half-life of 10 years, how much of a 100 g sample will remain after 30 years?
The equation N = N0e-λt is used to calculate the number of undecayed nuclei at time t. What does N0 represent?
What is radioactive decay?
