Exam-style question
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What happens when an electron in an atom moves from a higher energy level to a lower energy level?.
- A.A photon is emitted
- B.A photon is absorbed
- C.No energy change occurs
- D.The atom becomes ionized
Model answer
What a good answer should say
- A photon is emitted.
- the correct option
Explanation
Why this works
The correct answer is A photon is emitted. This supports Explain photon emission when electrons move to lower energy levels.
in Energy levels and photon emission because it uses the required AQA A-Level Physics idea directly. The other options are less suitable because they either describe a different particle/radiation concept or miss the key condition tested by the question.
Common mistake
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