In the given figure for the stationary orbits of the hydrogen atom, mark the transitions representing the Balmer and Lyman series.

The energy of an electron in nth orbit of hydrogen atom is

Determine the speed of the electron in the n=3 orbit of hydrogen atom.

Write down the expression for the radii of orbits of hydrogen atom.Calculate the radius of the smallest orbit.

In which series of hydrogen spectra, the transition involves largest change of energy?

The radius of first orbits of hydrogen atom is called Bohr radius. (True /false).

Calculate the energy required to excite an electron from first orbit of the hydrogen atom to the third orbit?

State and explain the Bohr's postulates for the structure of the hydrogen atom. Obtain the expressio for Radii of permitted orbits.