If doubly ionised lithium atom is hydrogen-like with atomic number 3, the wavelength of radiation required to excite the electron in Li ++ from the first to the third Bhoh’r orbit and the number of different spectral lines observed in the emission spectrum of the above excited system are -
Text Solution
Verified by ExpertsThe correct answer is:
B
For a hydrogen-like ion:
For 
.
Electron is excited from 
to 
.
Energy required:
Now,
So wavelength required 
.
Now the electron is in 
. Possible emissions:
Total spectral lines:
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