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If neutrons exert only attractive force, why don't we have a nucleus containing neutrons alone?

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Knowledge Check

  • Which is the only isotope that does not contain a neutron?

    A
    Protium
    B
    Dutrium
    C
    Tritium
    D
    Chlorin-35

  • M_(p) denotes the mass of the proton and M_(n) denotes mass of a neutrons . A given nucleus of binding energy B, contains Z protons ans N neutrons . The mass M(N,Z) of the nucleus is given by (where C is the speed of light ) :

    A
    `M (N,Z) = NM_(n) + Zm_(p) - Bc^(2)`
    B
    `M(N,Z)= NM_(n) + ZM_(p)+ Bc^(2)`
    C
    M(N,Z) = NM_(n) +ZM_(P) - B//C^(2)`
    D
    `M (N,Z)= NM_(n) + Zm_(p) - B//c^(2)`

  • An atom of an element has 13 electrons and mass number 27. the nucleus of this atom contains ________ neutrons.

    A
    26
    B
    13
    C
    14
    D
    27

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