Edexcel IGCSE Physics 7.4 Ionising Radiation Questions
Ionising radiation can remove electrons from atoms or molecules; unstable nuclei emit α, β⁻ or γ radiation at unpredictable times.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- Explain ionisation as radiation removing electrons from atoms or molecules to form ions.
- State that radioactive decay is random: the exact time a particular unstable nucleus decays cannot be predicted.
Edexcel IGCSE Physics 7.4 Ionising Radiation Questions question 1
[Maximum number: 1]
It is not possible to predict exactly when a radioactive nucleus will decay.
Which feature of radioactive decay best explains this observation?
A
radioactive decay can change the structure of the nucleus
B
radioactive decay happens at random
C
radioactive decay is irreversible
D
radioactive decay makes a nucleus more stable
B
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