Home
Class 12
PHYSICS
The half life of radioactive Radon is 3....

The half life of radioactive Radon is `3.8 days` . The time at the end of which `(1)/(20) th` of the radon sample will remain undecayed is `(given log e = 0.4343 ) `

A

3.8 days

B

16.5 days

C

33 days

D

76 days

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • NUCLEI

    NCERT FINGERTIPS|Exercise Nuclear Energy|10 Videos
  • NUCLEI

    NCERT FINGERTIPS|Exercise Higher Order Thinking Skills|8 Videos
  • NUCLEI

    NCERT FINGERTIPS|Exercise Mass Energy And Nuclear Binding Energy|9 Videos
  • MOVING CHARGES AND MAGNETISM

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos
  • PRACTICE PAPPER

    NCERT FINGERTIPS|Exercise Practice Paper 3|50 Videos

Similar Questions

Explore conceptually related problems

The half-life of a radioactive substance is 10 days. The time taken for the ((7)/(8)) th of the sample of disintegrates is

The half-life of radon is 3.8 days. Three forth of a radon sample decay in.

The half life of a radioactive substance is 30 days. What is the time taken to disintegrate to 3//4^(th) of its original mass ?

The half life of a radioactive substance is 20s, the time taken for the sample to decay by 7//8^(th) of its initial value is

The half life a radioactive element is 30 days, if the mass of the specimen reduces to 1//10^(th) then the time taken is :-

The half life of radon is 3.8 days . After how many days will only one twentieth of radon sample be left over ?

The half life of radioactive isotope is 3 hour. If the initial mass of isotope were 256 g, the mass of it remaining undecayed after 18 hr is

Radon has 3.8 days as its half-life . After how many days 25% of a radon sample remains undecayed ?

NCERT FINGERTIPS-NUCLEI-Radioactivity
  1. The count rate of a radioactive sample falls from 4.0xx10^6 s^(-1) to ...

    Text Solution

    |

  2. Carbon dating is best suited for determining the age of fossils of the...

    Text Solution

    |

  3. The half life of radioactive Radon is 3.8 days . The time at the end o...

    Text Solution

    |

  4. A radioactive element X with half life 2 h decays giving a stable elem...

    Text Solution

    |

  5. The half life of .38^90Sr is 28 years. The disintegration rate of 15 m...

    Text Solution

    |

  6. A sample of a radioactive element has a mass of 10 g at an instant t=0...

    Text Solution

    |

  7. The count rate from 100cm^(3) of a radioactive liquid is c. Some of th...

    Text Solution

    |

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

    Text Solution

    |

  9. A sample of radioactive material has mass m, decay constant lambda, an...

    Text Solution

    |

  10. Two radioactive substance A and B have decay constants 5 lambda and la...

    Text Solution

    |

  11. Plutonium decays with half life of 24000 years. If plutonium is stored...

    Text Solution

    |

  12. A fraction f1 of a radioactive sample decays in one mean life, and a f...

    Text Solution

    |

  13. The activity of a radioactive sample is measures as N0 counts per minu...

    Text Solution

    |

  14. The number of beta particles emitter by radioactive substance is twice...

    Text Solution

    |

  15. During negative B decay, an anti- neutrino is also emmited along with ...

    Text Solution

    |

  16. Which of the following cannot be emitted by radioactive substances dur...

    Text Solution

    |

  17. A radioactive decay can form an isotope of the original nucleus with t...

    Text Solution

    |

  18. Pick out the incorrect statement from the following .

    Text Solution

    |

  19. Consider alpha-, beta- particles and gamma- rays, each having an energ...

    Text Solution

    |

  20. The electron emitted in beta radiation originates from

    Text Solution

    |