Question
Download Solution PDFThe half-life of a radioactive substance is 4 months. How much time it will take to decay 3/4th of the substance ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 2.
Key Points
- Half-life (T₁/₂) = Time required for half of a radioactive substance to decay.
- Let’s break it down:
- After 1 half-life (4 months) → 50% of the substance remains.
- After 2 half-lives (8 months) →
- Half of the remaining 50% decays
- So only 25% remains
- That means 75% (3/4) has decayed.
- Therefore, it takes 8 months to decay 3/4th of the substance.
Last updated on Jul 7, 2025
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