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The shortest wavelength of Lyman series in hydrogen spectrum is

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Important Questions on Atoms

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The total energy of electron in third stationary orbit of H-atom is about
 
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The ratio of shortest wavelengths of hydrogen atom in Lyman, Balmer and Paschen series are in the ratio of
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Lyman series produced by hydrogen atom lies in the region of
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If energy required to remove one of the two electrons from He atom is 29.5 eV, then what is the value of energy required to convert a helium atom into α-particle?
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In Rutherford's experiment, number of particles scattered at 90° angle are x per second. Number particles scattered per second at angle 60° is
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Which of the following may be representing graph between number of scattered particles detected (N) and scattering angle (θ) in Rutherford's experiment?
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An electron in a hydrogen atom makes a transition from n1 to n2. If the time period of electron in the initial state is eight times that in the final state then
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When a hydrogen atom emits a photon of energy 12.09 eV, its orbital angular momentum changes by (where h is Planck's constant)