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An Electron in an Atom Initially Has an Energy 7

Question 3

Multiple Choice

An electron in an atom initially has an energy 7.5 eV above the ground state energy. It drops to a state with an energy of 3.2 eV above the ground state energy and emits a photon in the process. The momentum of the photon is:


A) 1.7 * 10-27 kg .m/s
B) 2.3 *10-27 kg . m/s
C) 4.0 * 10-27 kg . m/s
D) 5.7 * 10-27 kg .m/s
E) 8.0 * 10-27 kg . m/s

Correct Answer:

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