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27. The seeing ability or resolution of radiation is determined by its wavelength. If the size of an atom is approximately 10-10 m, how fast must an electron travel to have a wavelength smaller than that of an atom? (me 9.11x10- kg and h 6.63 x 10 J-s) a. 7.3 x 10% m/s b. 3.4 x 106 m/s c. 1.0 x 106 m/s d. 5.4 x 10 m/s 28. The ionization energy of the hydrogen atom is 13.6 eV. What is the energy of the n- 5 state? a. 2.72 eV b.-2.72 eVv c. 0.544 eV d.-0.544 eV 29. A hydrogen atom in the ground state absorbs a 12.75 eV photon. To what level is the electron promoted? (The ionization energy of hydrogen is 13.6 eV). a. n 2 30. Which of the following transitions in hydrogen from an initial state (n) to a final state (n) results in the most energy emitted? a. n, - 80, n 2
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