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Atoms and Nucle...

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  • Question 1
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    If the atom 100Fm257 follows the Bohr model and the radius of 100Fm257 is n times the Bohr’s radius, then find n.

  • Question 2
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    For uranium nucleus, how does its mass vary with volume?

  • Question 3
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    A nucleus with mass number 220 initially at rest, emits an alpha particle. If the Q value of the reaction is 5.5 MeV, calculate the K.E. of the α particle.

  • Question 4
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    The nuclei of which one of the following pairs of nuclei are isotones?

  • Question 5
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    Fission of nuclei is possible because the binding energy per nucleon in them

  • Question 6
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    The total energy of an electron in the first excited state of hydrogen atom is about – 3.4 eV. Its kinetic energy in this state is:

  • Question 7
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    Starting with a sample of pure 66Cu, 7/8 of it decays into Zn in 15 minutes. The corresponding half-life is

  • Question 8
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  • Question 9
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    Fig. shows the energy levels for an electron in a certain atom. Which transition shown represents the emission of a photon with the most energy?

  • Question 10
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    If a star can convert all the He nuclei completely into oxygen nuclei, the energy released per oxygen nucleus is [Mass of He nucleus is 4.0026 amu and mass of oxygen nucleus is 15.9994 amu]

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