Question

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Day Multiple Choice 서· Which of the following was one of the Bohr postulates concerning the model of the atom? (A) Electrons can, under certain Energy in eV 12.1 circumstances, exhibit wave-like B) Electrons can occupy only certain, quantized energy levels in the atom (C) All light is composed of photons.. D) All atoms are mostly empty space E) Electrons and protons are uniformly pdethe atom, like a 5. An atom with one electron has an The figure above shows a portion of the energy level diagram for hydrogen. Possible transitions among the energy levels are represented by arrows I, IT, and I11. Which of the following ionization energy of 24 ev. If an electron makes a transition from an excited energy state where E--6 eV to the ground state and a photon is released, what is the approximate wavelength of the photon? (A) 18 nm lists the transitions in order of their associated wavelengths of light, from shortest wavelength to longest wavelength? 3) 33 nm (C) 69 nm D) 120 nm (E) 180 nm (A) L, II, III C) II, L, III o. The work function for tungsten is 4.58 ev. Of the following, which is the best estimate of the threshold frequency required for the emission of photoelectrons from a tungsten cathode? (A) 0.1 x 1015 Hz (B) 0.5 x 105 Hz (C) 1x 10Hz (D) 2 x 10"H (E) 3 × 1015 Hz For the hydrogen atom, how does the potential , of the ators change as the energy energy level n increases? (A) The potential energy always increases (B) The potential energy always decreases. (C) The potential energy increases, then decreases (D) The potential energy decreases, then (E) The poteatial energy does sot change 7. :5 . After Rutherford bombarded gold foil with alpha particles, he concluded that the vol- ume of the atom was predominately empty space. Which observation led him to this A) The great majority of the incident alpha particles was not deflected (B) Some of the alpha particles were The figure above shows part of the energy level diagram for a bypotheticall atom. Which of the transátions indicated produces the most energetic photoes? (A) A (B) B (C) c (D) D delected 180 C) The paths of the deflected alpha D] The gold nuclei absorbed the great majority of the incident alpha (E) Predicting the final paths of the alpha particles was nearly impossible.

Answer 1

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