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Why the mass of the nucleus is less than...

Why the mass of the nucleus is less than the sum of masses of the nucleons?

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In the formation of the nucleus, the neutrons and protons have to collect in a very small space whos size of the order of `10^(-15)m`. The energy required for this purpose is spent by the nucleons at the cost of their masses. As a result of this, the mass of the nucleus formed becomes less than the sum of the masses of the individual nucleons.
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Knowledge Check

  • The mass of an atomic nucleus is less than the sum of the masses of its constituents. Thus mass defect is converted in to

    A
    heat energy
    B
    light energy
    C
    electrical energy
    D
    energy which binds nucleons together

  • Which of the following statement (s) is/are correct (i) The rest mass of a stable nucleus is less than the sum of the rest masses of its separated nucleous (ii) The rest mass of a stable nucleus is greater than the sum of the rest masses of its separated nucleous (iii) In culear fusion, energy is released by fusion two nuclei of medium amss (approximaltely 100 "amu" ) (iv) In nuclear fussion, energy is released by freagmentation of a very heavy nucleus

    A
    `(i),(iii)`
    B
    `(ii),(iii)`
    C
    `(i),(iv)`
    D
    `(ii),(iv)`

  • Consider the following statements. SI : The nuclear force is independent of the charge of nucleons. S2 : The number of nucleons in the nucleus of an atom is equal to the number of electrons in the atom. S3 : All nuclei have masses that are less than the sum of the masses of constituent nucleons. S4 : Nucleons belong to the family of leptons while electrons are members of the family of hadrons. Choose the correct statement/statements from these.

    A
    S1 only
    B
    S1 and S4
    C
    S2, S3 and S4
    D
    S1 and S3

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