Question

An electron in Li2+ falls from n = 2 to the ground state. Calculate the wavenumber, (νˉ), of the emitted photon.

Answer 1

You have to use the Rydberg formula:

\[\nu ^{-}=Z^2*R*(1/n_{1}^{2}-1/n_{2}^{2})\]
Where: R= Rydberg constant (1.097e7)
Z=Atomic number (9 in this case)

Answer 2

So 74300000

Answer 3

74047500