APFIVE Bohr Model Isotope Effect
An electron in a hydrogen atom transitions from the n=4 energy level to the n=2 energy level, emitting a photon. According to the Bohr model, how would the energy of this photon be affected if the atom’s nucleus were deuterium (₁²H) instead of protium (₁¹H)?
A
Doubled because of the doubled nuclear mass
B
Unchanged as nuclear mass doesn’t affect electron energy
C
Slightly increased due to the reduced nuclear recoil
D
Significantly increased due to stronger nuclear force
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