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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is radioactive decay?
💡 Hint: Think about nuclear instability.
Question 2
Easy
Define half-life.
💡 Hint: It involves halving the quantity.
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 equation representing the number of undecayed nuclei?
- N(t) = N₀ e^(λt)
- N(t) = N₀ e^(-λt)
- N(t) = N₀ + λt
💡 Hint: Remember the exponential decay model.
Question 2
True or False: The decay constant (λ) is a measure of the stability of a nucleus.
- True
- False
💡 Hint: Consider what high decay values signify.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A sample contains 800 atoms of a radioactive isotope with a decay constant of 0.346 year⁻¹. Determine how long it will take for only 100 atoms to remain.
💡 Hint: You'll have to apply logarithmic methods to isolate t.
Question 2
If a radioactive isotope has a half-life of 20 years, how much of a 500g sample will remain after 80 years? Explain your reasoning step-by-step.
💡 Hint: Count the number of half-lives in 80 years first, then calculate accordingly.
Challenge and get performance evaluation