Radioactive Decay
Chemistry ⇒ Nuclear Chemistry
Radioactive Decay starts at 10 and continues till grade 12.
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See sample questions for grade 10
A radioactive isotope has a half-life of 10 years. If you start with 80 grams, how much will remain after 20 years?
A radioactive sample has a half-life of 4 hours. If you start with 32 grams, how much will remain after 12 hours?
A sample of a radioactive isotope decays from 100 g to 12.5 g in 3 days. What is the half-life of the isotope?
A scientist observes that a radioactive sample loses 75% of its activity in 6 hours. What is the half-life of the sample?
Describe the difference between alpha, beta, and gamma radiation in terms of their composition.
Describe the main difference between natural and artificial radioactive isotopes.
Describe what happens to the atomic number and mass number during beta-minus decay.
Describe what happens to the atomic number and mass number of an atom when it undergoes alpha decay.
Explain why alpha particles are less penetrating than beta or gamma radiation.
Explain why gamma rays are often emitted along with alpha or beta particles during radioactive decay.
Explain why radioactive decay is considered a random process.
If a radioactive element has a half-life of 2 days, how many days will it take for only 1/8 of the original sample to remain?
If a sample contains 200 mg of a radioactive substance and its half-life is 5 hours, how much will remain after 15 hours?
What is radioactive decay?
