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Nuclei Test - 5...

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  • Question 1
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    Consider the following reaction:
     1H2+ 1H21 He4+Q{ _{  }^{ 1 }{ H } }_{ 2 }+{ _{  }^{ 1 }{ H } }_{ 2 }\rightarrow { _{ 1 }^{  }{ He } }^{ 4 }+Q
    If m(1 H2)=2.0141um({ _{ 1 }^{  }{ H } }^{ 2 })=2.0141u; m(2 He4)=4.0024um({ _{ 2 }^{  }{ He } }^{ 4 })=4.0024u, the energy QQ released (in MeV) in this fusion reacion is

  • Question 2
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    In the nuclear reaction
    1 H2+1 H2 2 He3+0 n1{ _{ 1 }^{  }{ H } }^{ 2 }+{ _{ 1 }^{  }{ H } }^{ 2 }\rightarrow { _{ 2 }^{  }{ He } }^{ 3 }+{ _{ 0 }^{  }{ n } }^{ 1 }
    if the mass of the deuterium atom =2.014741a.m.u=2.014741a.m.u, mass of 2 He3=3.016977a.m.u{ _{ 2 }^{  }{ He } }^{ 3 }=3.016977a.m.u and mass of neutron =1.008987a.m.u=1.008987a.m.u, then the QQ value of the reaction is nearly

  • Question 3
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    Binding energy per nucleon for C12{C}^{12} is 7.68MeV7.68MeV and for C13{C}^{13} is 7.74MeV7.74MeV. The energy required to remove a neutron from C13{C}^{13} is

  • Question 4
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    Binding energy per nucleon of 1 H2{ _{ 1 }^{  }{ H } }^{ 2 } and 2 He4{ _{ 2 }^{  }{ He } }^{ 4 } are 1.1MeV1.1MeV and 7.0MeV7.0MeV, respectively. Energy released in the process 1 H2+1 H22 He4{ _{ 1 }^{  }{ H } }^{ 2 }+{ _{ 1 }^{  }{ H } }^{ 2 }\rightarrow{ _{ 2 }^{  }{ He } }^{ 4 } is

  • Question 5
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    When a nucleus in an atom undergoes radioactive decay, the electronic energy levels of the atom

  • Question 6
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    Tritium is an isotope of hydrogen whose nucleus Triton contains 22 neutrons and 11 proton. Free neutrons decay into p+e+vp+\vec { e } +\vec { v } .  If one of the neutrons in Triton decays, it would transform into 2 He3{ _{ 2 }^{  }{ He } }^{ 3 }. This does not happen. This is because

  • Question 7
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    Heavy stable nucleus have more neutrons than protons. This is because of the fact that

  • Question 8
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    The particle used in nuclear fission for bombardment is:

  • Question 9
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    Nuclear binding energy is equivalent to 

  • Question 10
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    The accepted unit of atomic and molecular mass is:

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