GCSE Physics – Half-life
Learning Objectives
-I can define the term half-life
-I can relate half-life to radioactive decay
-I can determine half-life from graphic or mathematical information
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- Current
- Review
- Answered
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1. Question
What type of process is radioactive decay?
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2. Question
What does the half-life involve?
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3. Question
What is half-life of a radioactive isotope?
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4. Question
How else can half-life of a radioactive isotope be defined?
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5. Question
What is the range of half-life of radioactive isotopes?
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6. Question
Why do we use large sources to measure half-life?
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7. Question
What type of graph will a non-radioactive nuclei vs time graph be?
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8. Question
What type of graph will an activity vs time graph be?
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9. Question
What type of graph will a count rate vs time graph be?
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10. Question
How do we express the percentage remaining after 2 half lives?
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11. Question
How do we express the percentage remaining after 3 half lives?
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12. Question
What is the half-life of a sample where activity drops from 2 Bq to 0.02 Bq in 21 days?
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13. Question
If it takes 2 days for activity to drop from 10,000 Bq to 2,500 Bq what is the half life?
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14. Question
If it takes 6000 years for activity to drop from 100,000 Bq to 50,000 Bq what is the half life?
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15. Question
If it takes 160 years for activity to drop from 32,000 Bq to 2,000 Bq what is the half life?
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16. Question
What is the half-life of a sample where activity drops from 1,200 Bq to 300 Bq in 10 days?
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17. Question
What is the half-life of a sample where activity drops from 1,200 Bq to 600 Bq in 6 days?
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18. Question
What is the half-life of a sample where activity drops from 1,200 Bq to 75 Bq in 4 days?
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19. Question
What is the half-life of a sample where activity drops from 10 Bq to 1.25 Bq in 9 days?
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20. Question
The half-life of a plutonium isotope is 5 years. How much of 100g of plutonium will be left after 15 years?