A doubly ionized lithium atom is hydrogen-like with \( \mathrm{P} \...

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A doubly ionized lithium atom is hydrogen-like with
\( \mathrm{P} \) atomic number 3 . Find the wavelength of the radiation

W required to excite the electron in \( L i^{++} \)from the third Ist orbit to Bohr orbit. The ionization energy of the hydrogen atom is \( 13.6 \mathrm{eV} \). (in \( A \) )
(1) 113.74
(2) 212.68
(3) 110.04
(4) 118.90
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