Home
Class 12
PHYSICS
The mass of a nucleus can be either less...

The mass of a nucleus can be either less than or more than the sum of the masses of nucleons present in it.
The whole mass of the atom is considered in the nucleus.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The whole mass of the atom is concentrated at nucleus and mass of nucleus `lt` (Sum of the masses of nucleons) because, when nucleons combine some energy is wasted.
Promotional Banner

Topper's Solved these Questions

  • ATOMIC AND NUCLEAR PHYSICS

    ERRORLESS|Exercise Past Years Questions|67 Videos

  • ALTERNATING CURRENT

    ERRORLESS|Exercise Assertion & Reason|13 Videos

  • CURRENT ELECTRICITY

    ERRORLESS|Exercise ASSERTION AND REASON|26 Videos

Similar Questions

Explore conceptually related problems

The mass number of a nucleus is

The mass number of a nucleus is.

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

The mass number of a nucleus of an element is

Assertion:The whole mass of the atom is concentrated in the nucleus. Reason:The whole mass of the atom is concentrated in the nucleus Reason:The mass of a nucleus can be either less than or more than the sum of the masses of nucleons present in it.

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

The mass number of a nucleus is equal to

The mass number of a nucleus is equal to

ERRORLESS-ATOMIC AND NUCLEAR PHYSICS-Assertion and Reason
  1. Assertion: Bohr had to postulate that the electrons in stationary orbi...

    Text Solution

    |

  2. Radioactive nuclei emit beta^-1 particles. Electrons exist inside th...

    Text Solution

    |

  3. Assertion: ""(Z)X^(A) undergoes 2alpha- decays, 2beta- decays and 2gam...

    Text Solution

    |

  4. Density of all the nuclei is same. Radius of nucleus is directly pro...

    Text Solution

    |

  5. Assertion : Isobars are the element having same mass number but diffe...

    Text Solution

    |

  6. Assertion: The force of repulsion between atomic nucleus and alpha-par...

    Text Solution

    |

  7. Assertion: The positively changed nucleus of an atom has a radius of a...

    Text Solution

    |

  8. Assertion: According to classical theory, the proposed path of an elec...

    Text Solution

    |

  9. Assertion: Electrons in the atom are held due to coulomb forces. Rea...

    Text Solution

    |

  10. The mass of a nucleus can be either less than or more than the sum of ...

    Text Solution

    |

  11. Assertion: Hydrogen atom consists of anly one electron but its emissio...

    Text Solution

    |

  12. Assertion Bamer series lies in the visble region of electromagnetic s...

    Text Solution

    |

  13. Assertion: For the scattering of alpha-particles at a large angles, on...

    Text Solution

    |

  14. Cabalt-60 is useful in cancer therapy. Cabalt-60 is source of Y-radi...

    Text Solution

    |

  15. Amongst alpha,beta and gamma-particles, alpha-particle has maximum pen...

    Text Solution

    |

  16. The ionising power of alpha-particle is less compared to alpha-particl...

    Text Solution

    |

  17. The mass of beta-particles when they are emitted is higher than the ma...

    Text Solution

    |

  18. Radioactivity of 108 undecayed radioactive nuclei of half life of 50 d...

    Text Solution

    |

  19. The binding energy per nucleon, for nuclei with atomic mass number A g...

    Text Solution

    |

  20. Electron capture occurs more often than positron emission in heavy ele...

    Text Solution

    |