Question: a. Is a (4 p ightarrow 4 s) transition allowed in sodium? If so, what is its wavelength? If not, why not? b. Is

a. Is a \(4 p \rightarrow 4 s\) transition allowed in sodium? If so, what is its wavelength? If not, why not?

b. Is a \(3 d \rightarrow 4 s\) transition allowed in sodium? If so, what is its wavelength? If not, why not?

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