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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the definition of half-life?
π‘ Hint: Think of what happens to a fraction of the substance.
Question 2
Easy
What does the decay constant (Ξ») represent?
π‘ Hint: Consider it a measure of how quickly something changes.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the half-life of a radioactive substance?
- The time it takes for the substance to fully decay
- The time required for half of the substance to decay
- The time needed for the substance to become stable
π‘ Hint: Consider the definition!
Question 2
True or False: The decay constant (Ξ») is inversely proportional to half-life.
- True
- False
π‘ Hint: Remember how they relate in the formula.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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?
π‘ Hint: Calculate how many half-lives fit into the total time.
Question 2
An isotope has a half-life of 5 years. If you start with 120g, how much will remain after 15 years?
π‘ Hint: Identify the number of times the half-life fits into the total time.
Challenge and get performance evaluation