EXERCISE 20

An electron is moving in an orbit of a hydrogen atom from which there can be a maximum of six transitions. An electron is moving in another hydrogen atom from which there can be a maximum of three transition. The ratio of the velocities of the electrons in these two orbits is

The wavelength of radiation emitted is ${\lambda }_0$ when an electron jumps from the third to the second orbit of the hydrogen atom. For the electron which jumps from the fourth to the second  orbit of hydrogen, the wavelength of radiation emitted will be

The orbital frequency of an electron in the hydrogen atom is proportional to 

The product of linear momentum and angular momentum of an electron of the hydrogen atom is proportional to $n^x$ where x is?

Which of the following transitions in the Balmer series for hydrogen will have the longest wavelength?

Of the following transitions in the hydrogen atom, the one which gives an emission line of the highest frequency is 

An electron collides with a hydrogen atom in its ground state and excites it to $n=3$. The energy given to the hydrogen atom in this inelastic collision is (neglect the recoiling of the hydrogen atom)

Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then, the number of spectral lines in the emission spectra will be