Doubly ionized lithium Li21 (Z 5 3) and triply ionized
Chapter , Problem 20(choose chapter or problem)
Doubly ionized lithium Li21 (Z 5 3) and triply ionized beryllium Be31 (Z 5 4) each emit a line spectrum. For a certain series of lines in the lithium spectrum, the shortest wavelength is 40.5 nm. For the same series of lines in the beryllium spectrum, what is the shortest wavelength?
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