GCSE Physics – Calculating half life
Learning Objectives
-I can define half-life
-I can calculate half-life
Quiz Summary
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Question 1 of 16
1. Question
What type of process is radioactive decay?
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Question 2 of 16
2. Question
What is half-life of a radioactive isotope?
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Question 3 of 16
3. Question
How else can half-life of a radioactive isotope be defined?
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Question 4 of 16
4. Question
Why do we use large sources to measure half-life?
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Question 5 of 16
5. Question
What is the range of half-life of radioactive isotopes?
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Question 6 of 16
6. Question
How do we express the percentage remaining after 2 half lives?
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Question 7 of 16
7. Question
How do we express the percentage remaining after 3 half lives?
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Question 8 of 16
8. 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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Question 9 of 16
9. 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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Question 10 of 16
10. 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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Question 11 of 16
11. Question
The half-life of a plutonium isotope is 5 years. How much of 100g of plutonium will be left after 15 years?
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Question 12 of 16
12. 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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Question 13 of 16
13. 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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Question 14 of 16
14. 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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Question 15 of 16
15. 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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Question 16 of 16
16. 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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