Which one of the following statements is correct?

  • A
    The mass of the nucleus must be less than the sum of the masses of the constituent neutrons and protons.
  • B
    The mass of the nucleus must be equal to the sum of the masses of the constituent neutrons and protons.
  • C
    The mass of the nucleus must be greater than the sum of the masses of the constituent neutrons and protons.
  • D
    The mass of the nucleus must be equal to only the masses of the constituent neutrons or protons.

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From the given data,the amount of energy required to break the nucleus of aluminium ${ }_{13}^{27} {Al}$ is $x \times 10^{-3} {J}$.
Mass of neutron $= 1.00866 \, {u}$
Mass of proton $= 1.00726 \, {u}$
Mass of aluminium nucleus $= 26.98154 \, {u}$
(Assume $1 \, {u}$ corresponds to $1 \, {J}$ of energy for the purpose of this calculation)
(Round off to the nearest integer)

The mass of a $H$-atom is less than the sum of the masses of a proton and an electron. Why is this?

The mass of a nucleus,a neutron,and a proton are $M$,$M_n$,and $M_p$ respectively. Then which of the following is true?

The energy equivalent to a substance of mass $1 \,g$ is

The binding energy of a nucleus is a measure of its

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