Saved Bookmarks
| 1. |
(a) In hydrogenatom an electron undergoes transitions from2ndexcitedstateto the1st excitedstateand then to theground state. Identify the spectral series to whichtransition belong . (b) Find out the ratio of the wavelenghtof the emittedradiations in thetwo cases. |
|
Answer» Solution :(a) When an ELECTRON undergoes a TRANSITION from 2nd excited STATE (n = 3) to the 1st excited state (n = 2) in hydrogen atom, first spectral line of Balmer series is emitted. When the electron jumps from Ist excited state in 2) to the ground state (1=1), first spectral line of Lyman series is emitted. (b) `(1)/(lambda_(1)) = R [(1)/((2)^(2))- (1)/((3)^(2))] = (5R)/(36)and(1)/(lambda_(2)) = R [(1)/((1)^(2)) - (1)/((2)^(2))] = (3R)/(4)` `rArr (lambda_(1))/(lambda_(2)) = (27)/(5) = 5.4` |
|