4.2 - Half-Life
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Practice Questions
Test your understanding with targeted questions
What is the definition of half-life?
💡 Hint: Think of what happens to a fraction of the substance.
What does the decay constant (λ) represent?
💡 Hint: Consider it a measure of how quickly something changes.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the half-life of a radioactive substance?
💡 Hint: Consider the definition!
True or False: The decay constant (λ) is inversely proportional to half-life.
💡 Hint: Remember how they relate in the formula.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
If you have a sample of a radioactive isotope with an initial quantity of 800 grams and a half-life of 3 years, how much of the substance will remain after 9 years?
💡 Hint: Calculate how many half-lives fit into the total time.
An isotope has a half-life of 5 years. If you start with 120g, how much will remain after 15 years?
💡 Hint: Identify the number of times the half-life fits into the total time.
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