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Consolidate ideas of nuclear changes and the properties and uses of alpha, beta and gamma radiation, Explain why, over time, the activity of a source decreases
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3.7 Using radioactive materials
April 12, 2023
Here is some data from last lesson on popping popcorn. From this table, how long does it take for popcorn to pop?
Time taken to pop / s
Group 1st Attempt 2nd Attempt
1 34 24
2 5 52
3 9 22
Aims
• Consolidate ideas of nuclear changes and the properties and uses of alpha, beta and gamma radiation
• Explain why, over time, the activity of a source decreases
α β γ
The mass number:
The atomic number:
What is radiation?Video
α β γ
Using the text book
• Write explanations of three ways a nucleus can change: when it emits alpha, beta and gamma
Alpha (α) Particles
242He
Add a number to one or more boxes to accurately describe an alpha particle
Beta (β) particles
e01
Add a number to one or more boxes to accurately describe a beta particle
Gamma (γ) rays
Alpha particles
42
Beta particles
01
Gamma ray
00
4222286
22688 RnRa
Worked example
• What happens when polonium-218 undergoes beta decay?
0121885
21884 AtPo
What would the following elements decay into?
• Uranium-238 via alpha decay
• Thorium-234 via beta decay
• Protactinium-234 via beta decay
• Uranium-234 via alpha decay