(Solved): Consider the Bohr model of electron orbitals in a He+ion. When electrons in atoms relax from a hig ...

Consider the Bohr model of electron orbitals in a $${\mathrm{He}}^{+}$$ion. When electrons in atoms relax from a higher energy state (larger $$n$$ ) to a lower energy state (smaller n), light is emitted with energy equal to the difference in energy between the two states. Which of the following electronic transitions (changes in electron energy state) in a $${\mathrm{He}}^{+}$$ion would emit light in the visible region (400-700 $$\mathrm{nm}$$ ) of the electromagnetic spectrum? $$4?3$$ $$5?3$$ $$4?2$$ $$5?4$$