Atoms and Nucle...

The ratio between Bohr radii are

The spectral series of the hydrogen spectrum that lies in the ultraviolet region is the

In Bohr model of the hydrogen atom, the lowest orbit corresponds to

Suppose an electron is attracted towards the origin by a force k /rwhere \'k\' is a constant and `r\' is the distance ofthe electron from the origin. by applying Bohr model to this system, the radius of the n<sup>th</sup> orbital of the electron is found to be `r_n\' and the kinetic energy of the electron to be ‘T_n’. Then which of the following is true

Which of the following transitions in a hydrogen atom emits photon of the highest frequency

In terms of Rydberg\'s constant R, the wave number of the first Balmer line is

If the ionization potential of helium atom is 24.6 volt, the energy required to ionise it will be

In a hydrogen atom, which of the following electronic transitions would involve the maximum energy change

The minimum energy required to excite a hydrogen atom from its ground state is

The wavelength of the first line of Balmer series is 6563 Å. The Rydberg constant for hydrogen is about