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A double ionised lithium atom is hydroge...

A double ionised lithium atom is hydrogen like with atomic number `3`
(i)Find the wavelength of the radiation to excite the electron in `Li^(++)`from the first to the third bohr orbit (lonisation energy of the hydrogen atom equals `13. 6eV`
(ii) How many spectral lines are observed in the emission spectrum of the above excited system ?

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The correct Answer is:
`[(a) 113.7Å (b)3]`
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A double ionised lithium atom is hydrogen like with atomic number 3 (i)Find the wavelength of the radiation to excite the electron in Li^(++) from the first to the third bohr orbit (lonisection energy of the hydrogen atom equals 13. 6) (ii) How many spectral lines are observed in the emission spetrum of the above excled system ?

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