Multiple Choice
An atom can be excited
A) if it emits a photon.
B) if it collides with another atom or electron.
C) if it absorbs a photon.
D) if it emits a photon or if it collides with another atom or electron.
E) if it collides with another atom or electron or if it absorbs a photon.
Correct Answer:
Verified
Correct Answer:
Verified
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