chemistry
posted by Maria .
Hydrogenlike ions are those with only one electron such as He+ and Li2+. The Balmer formula for the transitions in these ions can be written as v=Z^2 cR(1/(n_1^2 )1/(n_2^2 )). Use this formula to calculate the lowestenergy transition in the Lyman and Balmer series for He+ and Li2+.

So use that formula. Post your work if you get stuck.
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