(a) The electron in a H-atom if not disturbed remains in the ground state (i.e. n = 1 state). When the electron receives energy from outside, it is elevated to anyone of the higher permitted states(excited state).
(b) The electron remains only for a short interval of time (generally in the order of 10 –8 s)in the excited state and comes back to the ground state finally.
(c) The electron can reach the ground state from anyone of the excited states in many ways. As a result, many electron transitions take place.
(d) According to Bohr, all electron transitions terminating at a particular state give rise to a particular spectral series.
(f) If an electron makes a jump from the nith to nfth orbit (ni > nf), the extra energy Ei – Ef is emitted as a photon of electromagnetic radiation. The corresponding wavelength is given by
(g) The value of R is 1.0973 × 107 m–1
