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Atoms and Nuclei question

2001 · Q144
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Atoms and Nuclei question

2001 · Q144

NEETPhysicsAtoms and NucleiMCQ+4 / −1
Mn and Mp represent the mass of neutron and proton respectively. An element having mass M has N neutrons and Z protons, then the correct relation will be
  1. A
    M < {N ⋅\cdot⋅ Mn + Z ⋅\cdot⋅ Mp}
  2. B
    M > {N ⋅\cdot⋅ Mn + Z ⋅\cdot⋅ Mp}
  3. C
    M = {N ⋅\cdot⋅ Mn + Z ⋅\cdot⋅ Mp}
  4. D
    M = N {Mn + Mp}
View written solutionFree

Correct answer: A

Given : Mass of neutron = Mn
Mass of proton = Mp;
Atomic mass of the element = M ;
Number of neutrons in the element = N and number of protons in the element = Z.

We know that the atomic mass (M) of any stable nucleus is always less than the sum of the masses of the constituent particles.

Therefore, M <\lt < [NMn + ZMp].

X is a neutrino, when b-particle is emitted.

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