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ChemistryGeneral Chemistry

Atomic Structure with Bohr: He⁺ Photon Energy for n = 5 to n = 2

Calculate the positive photon energy for the He⁺ n = 5 to n = 2 transition, using Z = 2 and checking the emission sign.

Question

Apply the Bohr model to a singly ionized helium atom, He⁺. Its electron drops from the n = 5 orbit to the n = 2 orbit. Calculate the energy, in joules, of the emitted photon.

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Evidence boundary

This calculation retains the He⁺ ion and n = 5 to n = 2 transition of OpenStax Chemistry 2e Exercise 6.26. It predicts the energy of one emitted photon in the textbook hydrogen-like Bohr approximation, not a measured spectral result. The constant’s precision determines the displayed rounding.