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The wavelength of Hβ–line of Balmer series is 4,860Å. Calculate the wavelength of Hα–line.
Calculate the radius of the third Bohr’s orbit of hydrogen atom and the energy of the electron in that orbit. Given that h = 6.625 × 10-34 J s; e = 1.6 × 10–19C; m = 9.1×10-19kg; c = 3 × 108 ms-1 and ε0 = 8.85 × 10-12 Fm-1
Calculate the kinetic energy and potential energy of the electron in the first orbit of hydrogen atom. Given, e = 1.6 × 10-19C and r = 0.53 × 10-10 m.
The Ha -line of the Balmer series is obtained from the transition n = 3 (energy = – 1.5 eV) to n = 2 (energy = – 3.4 eV). Calculate the wave length of this line. Given that h = 6.6 × 10-34 Js; 1eV = 1.6 × 10–19 J and c = 3 × 108 ms–1.
In Geiger-Marsden experiment, a 5 MeV α-particle is scattered through 180° from the gold foil. If the atomic number of gold is 79, find the distance of closest approach to the gold nucleus.