5 Questions Available
Showing 5 questions on this page
The wavelength of Hβ–line of Balmer series is 4,860Å. Calculate the wavelength of Hα–line.
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.
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.
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.
