問題詳情

15. An energy of 13.6 eV is needed to ionize an electron from the ground state of a hydrogen atom.What is the longest photon wavelength needed to accomplishes this task? (Plank constant =

)
(A) 60 nm
(B) 70 nm
(C) 80 nm
(D) 90 nm
(E) 100 nm

參考答案

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1240/13.6 = 91.17n.....★★★★★★,...