Half-Life (OCR GCSE Physics A (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the half-life of a radioactive isotope?
What is the half-life of a radioactive isotope?
Time for half the nuclei to decay
If atoms decay to atoms in minutes, what is the half-life?
If atoms decay to atoms in minutes, what is the half-life?
minutes
Which statement describes a source with a short half-life?
Which statement describes a source with a short half-life?
Very radioactive, quickly dies down
What is the half-life of Americium?
What is the half-life of Americium?
years
Why is Americium suitable for smoke alarms?
Why is Americium suitable for smoke alarms?
Weak activity, won't need replenishment
What can be predicted about radioactive decay?
What can be predicted about radioactive decay?
Half-life for large sample
Which device measures radioactivity count rate?
Which device measures radioactivity count rate?
Geiger-Muller tube
What does an activity of Bq mean?
What does an activity of Bq mean?
decay per second
Initial activity is Bq. What is the activity after half-lives?
Initial activity is Bq. What is the activity after half-lives?
Bq
After half-lives, activity is what percentage of initial?
After half-lives, activity is what percentage of initial?
Half-life is days. Count rate starts at /s. What is it after days?
Half-life is days. Count rate starts at /s. What is it after days?
counts/s
What happens to radioactive activity over time?
What happens to radioactive activity over time?
Decreases but never reaches zero