Home
Class 12
PHYSICS
Heavy stable nuclei have more neutrons t...

Heavy stable nuclei have more neutrons than protons. This is because of the fact that

A

neutrons are heavier than protons

B

electrostatic force between protons are repulsive

C

neutrons decay into protons through beta decay

D

nuclear forces between neutrons are weaker than that between protons

Text Solution

Verified by Experts

The correct Answer is:
b
Stable heavy nuclei have more neutrons than protons. This is because electrostatic force between protons is repulsive which may reduce stability.
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    NCERT EXEMPLAR ENGLISH|Exercise VERY SHORT ANSWER TYPE QUESTIONS|16 Videos

  • WAVE OPTICS

    NCERT EXEMPLAR ENGLISH|Exercise Long Answer type Questions|5 Videos

Similar Questions

Explore conceptually related problems

Why do stable nuclei never have more protons than neutrons ?

Neutrons are more effective projectiles than protons because they

Animal cells have more mitochondria than plant cells because

A radioactive nuclide emits gamma -rays due to a. K-electron capture b. Nuclear transition from higher to lower energy c. Presence of greater number of neutrons than protons d. Presence of greater of protons than neutrons

Statement I:Heavy nuclides tend to have more number of neutrons than protons. Staements II: In hevay nuclei, as there is coloumbic repulsion between protons, so excess of neutrons are preferable:

Thallous chloride is more stable than thallic chloride because of

Lyophilic sols are more stable than lyophobic sols because

Statement : The plot of atomic number ( y -axis ) versus number of neutrons ( x -axis ) for stable nuclei shows a curvature towards x-axis fron the line of 45^@ slope as the atomic number is increased . Explanation : proton -proton electrostatic repulsions begin to overcome attracive forces involving protons and neutrons in heavier nuclides.

Assertion (A) : Neutrons have no charge but protons are positively charged, hence net result is repulsion in them in the nucleus of an atom. In the presence of this repulsion the nucleus is highly stable. Reason (R) : The pair of nucleons (neutrons and protons) continuously exchanges the charge through mesons which may either be positively or negatively charged.

Snow is more heat insulating than ice, because

NCERT EXEMPLAR ENGLISH-SEMICONDUCTOR ELECTRONICS: MATERIAL,DEVICES AND SIMPLE CIRCUIT-Multiplel choice questions
  1. M(x) and M(y) denote the atomic masses of the parent and the daughter ...

    Text Solution

    |

  2. Tritium is an isotope of hydrogen whose nucleus triton contains 2 neut...

    Text Solution

    |

  3. Heavy stable nuclei have more neutrons than protons. This is because o...

    Text Solution

    |

  4. In a nuclear reactor, moderators slow down the neutrons which come out...

    Text Solution

    |

  5. Fusion processes, like combining two deuterons to form a He nucleus ar...

    Text Solution

    |

  6. Sample of two radioactive nuclides A and B are taken. lambda(A) and la...

    Text Solution

    |

  7. The variation of decay rate of two radioactive samples A and B with ti...

    Text Solution

    |

  8. He(2)^(3) and He(1)^(3) nuclei have the same mass number. Do they have...

    Text Solution

    |

  9. Draw a graph showing the variation of decay rate with number of active...

    Text Solution

    |

  10. Which sample A or B shown in figure has shorter mean-life ?

    Text Solution

    |

  11. Which one of the following cannot emit radiation and why ? Excited nuc...

    Text Solution

    |

  12. In pair annihilation an electron and a positron destroy each other to ...

    Text Solution

    |

  13. Why do stable nuclei never have more protons than neutrons ?

    Text Solution

    |

  14. Consider a radioactive nucleus A which decays to a stable nucleus C th...

    Text Solution

    |

  15. A piece of wood form the ruins of an ancient building was found to ha...

    Text Solution

    |

  16. Are the nucleons fundamental particles or do they consist of still sma...

    Text Solution

    |

  17. A nuclide 1 is said to be the mirror isobar of nuclide 2 if Z(1) =N(1)...

    Text Solution

    |

  18. Sometimes a radioactive nucleus decays into a nucleus which itself is...

    Text Solution

    |

  19. Deuteron is a bound state of a neutron and a proton with a binding ene...

    Text Solution

    |

  20. The deuteron is bound by nuclear forces just as H-atom is made up of p...

    Text Solution

    |