Exam-style question
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What happens to an atom when it absorbs energy during an electron collision?.
- A.The atom becomes ionized.
- B.The atom emits a photon.
- C.The atom's electrons move to a higher energy level.
- D.The atom's mass increases.
Model answer
What a good answer should say
- The atom's electrons move to a higher energy level.
Explanation
Why this works
When an atom absorbs energy from an electron collision, its electrons can gain enough energy to transition to a higher energy level, which is known as excitation.
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