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The ionized helium atom can be treated with a Bohr model with nuclear charge Z=2. The...

The ionized helium atom can be treated with a Bohr model with nuclear charge Z=2. The resulting energy levels are four times those of the hydrogen atom:

Ehelium=4Ehydrogen= -(54.4eV)/n^2

From those energy levels, calculate the wavelengths of spectral lines from ionized helium for transitions that end on nf=1. Do any of these lie in the visible range? Would any spectral lines of ionized helium lie in the visible range?

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