This is one of my review questions that I am having a hardtime answering The ion

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This is one of my review questions that I am having a hardtime answering The ionized Helium atom can be treated with a Bohr model withnuclear charge Z=2. The resulting energy levels are four timesthose of the hydrogen atom, so: E(helium)=4 E(hydrogen)= (-54.4eV)/n2. Consider the wavelengths of spectral lines fromionized helium for transitions that end on nf=1. Whichof the following is one of the lines in the visible region for theionized helium? This is one of my review questions that I am having a hardtime answering The ionized Helium atom can be treated with a Bohr model withnuclear charge Z=2. The resulting energy levels are four timesthose of the hydrogen atom, so: E(helium)=4 E(hydrogen)= (-54.4eV)/n2. Consider the wavelengths of spectral lines fromionized helium for transitions that end on nf=1. Whichof the following is one of the lines in the visible region for theionized helium? Answer 435nm 656nm 492nm no spectrallines in the visible

Explanation / Answer

energy of the radiation is the difference in energy levels =54.4-54.4/n2=hc/ =hcn2/54.4(n2-1)=22.8*n2/(n2-1)nm substituting the options and checking whether value of n is an integer we get option b =

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