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17. An energy of 13.6 eV is needed to ionize an electron from the ground state of a hydrogen atom. What wavelength in nm is needed if a photon accomplishes this task?
(A) 60
(B) 80
(C) 70
(D) 90

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難度： 非常困難


17. An energy of 13.6 eV is needed to io..-阿摩線上測驗