Atoms and Nucle...

Hydrogen atom excites energy level from fundamental state to n = 3. Number of spectrum lines according to Bohr, is

Number of spectral lines in hydrogen atom is

The wavelength of the energy emitted when electron comes from fourth orbit to second orbit in hydrogen is 20.397 cm. The wavelength of energy for the same transition in He⁺is

Minimum excitation potential of Bohr\'s first orbit in hydrogen atom is

The wavelength of radiation emitted is λ₀ when an electron jumps from the third to the second orbit of hydrogen atom. For the electron jump from the fourth to the second orbit of the hydrogen atom, the wavelength of radiation emitted will be

The energy of electron in first excited state of H-atom is– 3.4 eV its kinetic energy is

The energy required to excite an electron from the ground state of hydrogen atom to the first excited state, is

Which of the following phenomena suggests the presence of electron energy levels in atoms?

Which of the following spectral series in hydrogen atom give spectral line of 4860 Å?

If scattering particles are 56 for 90° angle, then at anangle 60° it will be