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An electron revolve round the nucleus of charge Ze. In order to excite the electron from state n=2 to n=3 the energy required is 47.2 eV. What is the value of Z ?
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Correct option is A
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In a sample of ions, a Li++ ion electron in first Bohr orbit is excited to a level by a radiation of wavelength λ. When the ion gets de-excited to the ground state in all possible ways (including intermediate emissions), a total of six spectral lines are observed. What is the value of λ ?
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