Exam-style question
Try this first
In an atomic energy-level diagram, what does a downward transition of an electron represent?.
- A.Absorption of energy
- B.Emission of a photon
- C.Ionization
- D.Excitation
Model answer
What a good answer should say
- Emission of a photon.
- the correct option
Explanation
Why this works
The correct answer is Emission of a photon. This supports Interpret simple atomic energy-level diagrams.
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
No common mistake is linked to this question yet.