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Q.
Among species $H , Li ^{2+}, He ^{+}, Be ^{3+}$ and $Al ^{3+}$, Bohr's model was able to explain the spectra of
Structure of Atom
Solution:
Except $Al ^{3+}$, all contain one electron and Bohr's model could explain the spectra for one electron system, Bohr's model was not able to explain the spectra of multielectron system.