Energy Levels: What is the shortest wavelength of a photon that can be emitted by a hydrogen atom, for which the initial state is n = 3? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 822 nm
B. 850 nm
C. 103 nm
D. 91.4 nm
E. 950 nm
Answer: C
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If the scattering angle of the light in Compton's scattering experiment is 90°, what is the change in the wavelength of the light?
(melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s) A) 1.22 × 10-12 m B) 2.42 × 10-12 m C) 3.65 × 10-12 m D) 4.85 × 10-12 m
Rutherfordium-261 has a half-life of 1.08 min. How long will it take for a sample of rutherfordium to lose one-third of its nuclei?
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