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An electron revolves around a nucleus of charge ZeIn order to excite the electron from the state n=3 to n= 4, the energy required is 66.0 eV. Then atomic number Z is

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Important Questions on Atoms and Nuclei

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IMPORTANT
Rutherford's α -scattering experiment concludes that_____.
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IMPORTANT
Angular momentum of an electron in hydrogen atom is 3 h2π (h is the Planck's constant). The K.E. of the electron is
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The density of nucleus is of the order of
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In the hydrogen atom spectrum λ3-1 and λ2-1 represent wavelengths emitted due to transition from second and first excited states to the ground state respectively. The value of λ3-1λ2-1 is N/32, then sum of digits in N is?
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The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is
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The ratio of the longest to the shortest wavelengths in the Brackett series of hydrogen spectra is:
MEDIUM
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IMPORTANT
The shortest wavelength in Lyman series is 91.2 nm. The longest wavelength of the series is
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IMPORTANT
A hydrogen atom is in the 4th excited state, then: