List of top Physics Questions on Atoms asked in Punjab PMET

The wavelength of the first line of Balmer series is $6563\,??. The Rydberg constant for hydrogen is about

An electron tube was sealed-off during manufacture at a pressure of $ 1.2\times 10^{-7}mm $ of mercury at $ 27^{\circ}C $ . Its volume is $ 100\,cm^{3} $ . The number of molecules that remain in the tube is

The shortest wavelength of the Brackett series of hydrogen like atom (atomic number $ =Z$) is the same as the shortest wavelength of the Balmer series of hydrogen atom. The value of $Z$ is

The energy of an electron in an excited hydrogen atom is $ -3.4\,eV $ . Its angular momentum is

In Bohr?s model, the atomic radius of the first orbit is $r_0$ . The radius of the third orbit, is