N excited hydrogen atom emits light with a wavelength of 397. 2 nm to reach the energy level for which n = 2. In which principal quantum level did the electron begin?.

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Ithink that the use of creativity in the sciences entails that one produce something out of nothing or from another thing. with this, i think that the he wrote down his results as four parts of the atomic theory is the manifestation of the  creativity of john dalton.

The answer you are looking for is option d