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AP® Physics 1 & 2

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Moderate

Which Energy Is Not Emitted?

APPH12-RDBLEE

The energy-level diagram for a theoretical atom is shown below.

If a gas of these atoms is excited and then allowed to fall back to ground state, which one of the following photon energies will never be emitted?

A

1.2 eV

B

2.5 eV

C

6.5 eV

D

9.0 eV