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Introduction to Radioactive Decay OALH
By Kieran Amery
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Last updated about 5 years ago
33 questions
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Do Now:
Question 1
1.
Describe what happens to the position of electrons when they absorb electromagnetic radiation.
Question 2
2.
How are positive ions formed?
Question 3
3.
What is an isotope?
Question 4
4.
Define repeatable.
Question 5
5.
Convert 400g to the correct unit.
Question 6
6.
Challenge: A firework appears to give off light because...
Key knowledge LCWC
Question 7
7.
What can make a nucleus unstable?
Question 8
8.
What does an unstable nucleus do in order to become more stable?
Question 9
9.
What is radioactive decay?
Question 10
10.
What is activity?
Question 11
11.
What are the units for activity?
Question 12
12.
What is the “count-rate”?
Question 13
13.
What is the most commonly used radioactivity detector called?
Question 14
14.
What can make a nucleus unstable?
Question 15
15.
What does an unstable nucleus do in order to become more stable?
Question 16
16.
What is radioactive decay?
Question 17
17.
What is activity?
Question 18
18.
What are the units for activity?
Question 19
19.
What is the “count-rate”?
Question 20
20.
What is the most commonly used radioactivity detector called?
Recall Quiz:
Question 21
21.
What does an unstable nucleus do to become more stable?
Question 22
22.
What is radioactive decay?
Question 23
23.
What is the “count-rate”?
Question 24
24.
What is “activity”?
Question 25
25.
What are the units for activity?
We do:
Question 26
26.
Plutonium-239 is an isotope of plutonium.
In a sample of Plutonium-239there are 5.11x1023 atoms. Over 2 minutes 1.35x1023 Plutonium-239nuclei have decayed.
Explain why the nuclei have decayed.
You do:
Question 27
27.
Carbon-14 is an isotope of carbon.
In a sample of carbon-14there are 9.78 x1023 atoms. Over 10 minutes 2.32x1023 carbon-14nuclei have decayed.
Explain why the nuclei have decayed.
Indepedent task:
Question 28
28.
Describe what radioactive decay is and .explain why it is said to be random and unpredictable.
Plenary:
Question 29
29.
What is radioactive decay described as unpredictable?
Question 30
30.
Define radioactive decay.
Question 31
31.
State the units for activity.
Question 32
32.
What is the count rate?
Question 33
33.
What types of nuclei give out radiation?