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well, that's the thing- the problem doesn't state anything more than I put on there... the mass of a hydrogen atom will be that of 1 proton, but I'm not sure if that's what i should look for...
any thoughts?
A hydrogen atom, initially at rest in the n = 4 quantum state, undergoes a transition to the ground state, emitting a photon in the process. What is the speed (in terms of m/s) of the recoiling hydrogen atom?
anyone knows what to do? i calculated the energy difference and got 12.75 eV and i...