Physics – 5.2.4 Half-life | e-Consult
5.2.4 Half-life (1 questions)
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Calculation:
- After 10 years (1 half-life), the mass remaining is 400g / 2 = 200g.
- After another 10 years (2 half-lives), the mass remaining is 200g / 2 = 100g.
- After a further 10 years (3 half-lives), the mass remaining is 100g / 2 = 50g.
Answer: After 30 years, 50g of the isotope will remain.