Home ยป The excitation energy of a hydrogen atom from its ground state to its third excited state is Atomic Structure MCQs The excitation energy of a hydrogen atom from its ground state to its third excited state is January 8, 2022 18 Views Q. The excitation energy of a hydrogen atom from its ground state to its third excited state is A. 12.75 eV B. 0.85 eV C. 10.2 eV D. 12.1 eV Answer: 12.75 eV