ATOMS Set 1

In Bohr's model of hydrogen atom, which of the following pairs of quantities are quantized?

Energy required for the electron excitation in from the first to the third Bohr orbit is

First Bohr radius of an atom with is . Radius of its third orbit is

In the Bohr model of a hydrogen atom, the centripetal force is furnished by the coulomb attraction between the proton and the electron. If is the radius of the ground state orbit, is the mass and is charge on the electron and is the vacuum permittivity, the speed of the electron is

The ratio of minimum wavelength of Lyman and Balmer series will be