What strongest lines of the he spectrum occur at the, Chemistry

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What strongest lines of the he spectrum occur at the

The helium ion, He +, has energy levels similar to those of hydrogen and are given by the equation En= -5248.16/n^2 kj/mole

a) Calculate The energy of the four lowest energy levels of the He+ ion?

b) What is the energy and wavelength associated with the n=2- n=1 transition in He+?

c) What strongest lines of the He+ spectrum occur at the following wavelengths:1) 127.57 nm 2) 164.12nm 3)25.64 nm. Calculate the transitions associated with these lines.

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