Home
Class 12
PHYSICS
The half-life of radioactive material is...

The half-life of radioactive material is `3 h`. If the initial amount is `300 g`, then after `18 h`, it will remain

A

9.375 g

B

46.8 g

C

93.75 g

D

4.68 g

Text Solution

Verified by Experts

The correct Answer is:
A
`N = N_0 (1/2)^n`
in this case `n=t/T = 18/3 = 6`
`therefore N = 300 (1/2)^6 = 300xx 1/64 = 4.68 g`
Promotional Banner

Topper's Solved these Questions

  • ATOMS, MOLECULES AND NUCLEI

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP|30 Videos

  • CIRCULAR MOTION

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP-20|1 Videos

Similar Questions

Explore conceptually related problems

The half-life of a radioactive isotope is 3 h. if the initial mass of the isotope was 300 g, the mass which remained undercayed in 18 h would be

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

Half life of a radioactive particle is 1 second. The initial amount of A is 1000 . Then after 3 seconds, A will be

The half-life of a radioactive isotope is 3 hour. IF the initial mass of isotope were 256g the mass of it remaining undercayed after 18hr is:

Half life of a radioactive substance is 6 minute. If its initial amount is 32g, then amount present after 18 minute is

The half-life of a radioactive isotope is three hours. If the initial mass of the isotope were 256 g, the undecayed remaining mass after 18 hours would be

MARVEL PUBLICATION-ATOMS, MOLECULES AND NUCLEI -TEST YOUR GRASP
  1. The half-life of radioactive material is 3 h. If the initial amount is...

    Text Solution

    |

  2. According to Rutherford's atom model, the electrons revolving round th...

    Text Solution

    |

  3. The velocity of an electron in the first Bohr orbit of hydrogen atom i...

    Text Solution

    |

  4. The radius of the orbital of electron in the hydrogen atom 0.5 Å. The ...

    Text Solution

    |

  5. The radius of hydrogen atom in its ground state is 5.3 xx 10^-11 m. Af...

    Text Solution

    |

  6. In hydrogen atom, if the difference in the energy of the electron in n...

    Text Solution

    |

  7. The series limit of Balmer series is 6400 Å. The series limit of Pasch...

    Text Solution

    |

  8. An electron jumps from the 3rd orbit to the ground orbit in the hydrog...

    Text Solution

    |

  9. If the following atoms and molecylates for the transition from n = 2 t...

    Text Solution

    |

  10. The diagram shows the energy levels for an electron in a certain atom....

    Text Solution

    |

  11. The de-Broglie wavelength of a particle having a momentum of 2xx10^(-2...

    Text Solution

    |

  12. What will be the ratio of de - Broglie wavelengths of proton and alpha...

    Text Solution

    |

  13. de-Broglie wavelength associated with an electron accelerated through ...

    Text Solution

    |

  14. An electtron and a photon have same wavelength . If p is the moment of...

    Text Solution

    |

  15. An X ray tube is operated at an accelerating potential of 40 kV. What ...

    Text Solution

    |

  16. A The wavelength of the Kalpha line ofthe characteristic X rays emitt...

    Text Solution

    |

  17. In the following reaction. .12 Mg^24 + .2He^4 rarr .14 S i^X +.0 n^1...

    Text Solution

    |

  18. The radius of germanium (Ge) nuclide is measured to be twice the radiu...

    Text Solution

    |

  19. The binding energy per nucleon is maximum in the case of.

    Text Solution

    |

  20. The binding energy per nucleon of O^16 is 7.97 MeV and that of O^17 is...

    Text Solution

    |

  21. In any fission the ratio ("mass of fission produts")/("mass of paren...

    Text Solution

    |