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Prelaboratory Assignment: The Atomic Spectra of Hydrogen 1. The helium ion, He, has energy levels similar to those of hydrogen and are given by the equation: E, (-8.72 x 10- /n) Joules a) Calculate the energy of the four lowest energy levels of the He ion. E,- Joules EJoules Joules Joules b) What is the energy and wavelength associated with the n2 1 transition in He? kJ/mol; λ= nm c) The strongest lines of the He spectrum occur at the following wavelengths; (1) 127.57 nm, (2) 164.12 nm, and (3) 25.64 nm. Calculate the transitions associated with these lines. 53
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