Half-Life and Radioactive Decay Kinetics
Chemistry ⇒ Chemical Kinetics and Equilibrium
Half-Life and Radioactive Decay Kinetics starts at 11 and continues till grade 12.
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A 200 mg sample of a radioactive isotope decays to 25 mg in 3 hours. What is the half-life of the isotope?
A 50 g sample of a radioactive isotope has a half-life of 2 hours. How much will remain after 6 hours?
A radioactive element has a half-life of 12 years. How long will it take for 90% of the sample to decay?
A radioactive isotope decays to 1/32 of its original amount in 25 days. What is its half-life?
A radioactive isotope has a decay constant of 0.231 day-1. Calculate its half-life.
A radioactive sample decays from 160 g to 20 g in 24 hours. What is the half-life?
A radioactive sample has a decay constant of 0.1 yr-1. What is its half-life?
A sample contains 80 g of a radioactive isotope. If the half-life is 4 hours, how much will remain after 12 hours?
Describe how the concept of half-life is used in radiometric dating.
Describe the difference between first-order and zero-order decay kinetics.
Describe the significance of the exponential decay law in radioactive decay kinetics.
Explain why radioactive decay is considered a first-order process.
Explain why the decay of a radioactive isotope cannot be predicted for an individual atom but can be described statistically for a large number of atoms.
Explain why the half-life of a radioactive isotope is considered a constant property.
Explain why the mass of a radioactive sample decreases over time.
If the half-life of a substance is 2 days, how many days will it take for the substance to decay to 1/16 of its original amount?
The half-life of a certain isotope is 10 years. How much of a 100 g sample will remain after 30 years?
The rate constant (k) for a first-order radioactive decay is 0.693 yr-1. What is the half-life?
What is meant by the half-life of a radioactive substance?
