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Assuming that the incident radiation is capable of ejecting photo electrons from all the given metals, the lowest kinetic energy of the ejected photoelectron is observed with which of the given metals?

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Important Questions on Atomic Structure

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The ratio of de Broglie wave lengths of two particles, having mass ratio 1: 3 and kinetic energy ratio 2: 1 is
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If two particles A and B are moving with the same velocity, but wavelength of A is found to be double than that of B. Which of the following statements are correct?
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On the basis of Bohr's model, the radius of the 3rd  orbit is
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A subshell n=3, l=2 can accommodate maximum of
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If the energies of two light radiations E1 and E2 are 25eV and 100eV respectively, then their respective wavelengths λ1 and λ2 would be in the ratio λ1:λ2=
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If the work function for the photoelectron emission of a metal is 3.75eV, then the threshold wave length of the radiation needed for the ejection of the electron is approximately
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With increasing Principal Quantum number, the energy difference between adjacent energy levels in H-atom
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An element with mass number 181 contains 32% more neutrons as compared to protons. What is the symbol of that element?