Question Detail
Question
Radioactive substance half-life 2 weeks. Emits 3000 particles/min at start. After 6 weeks?
Correct Answer
Option B is the correct answer.
Detailed Explanation
6 weeks = 3 half-lives. Activity halves each time: 3000 → 1500 → 750 → 375 per minute.
Hint
A = A₀/2ⁿ.