Home
Class 12
PHYSICS
In a radioactive disintegration, the rat...

In a radioactive disintegration, the ratio of initial number of atoms to the number of atoms present at an instant of time equal to its mean life is

A

`(1)/(e^(2))`

B

`(1)/(e)`

C

`e`

D

`e^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
Isotope of the original nucleus is produced.
Promotional Banner

Topper's Solved these Questions

  • ATOMS, MOLECULES AND NUCLEI

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Exercise 2 (MISCELLANEOUS PROBLEMS)|26 Videos

  • ATOMS, MOLECULES AND NUCLEI

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET Corner|30 Videos

  • ATOMS, MOLECULES AND NUCLEI

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET Corner|30 Videos

  • CIRCULAR MOTION

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET CORNER|21 Videos

Similar Questions

Explore conceptually related problems

The rate of disintegration of a radioactive substance is …………………………… to the number of atoms present at that time .

The rate of disintegration at a given instant, is directly proportional to the number of atoms present at that instant. This is the statement of

The number of atoms present in a molecule of an element is known as its

Atomic number is always equal to the number of electrons present in an atom. True/False explain.

Is atomic number of an atom alwayus equal to the number of electons?

The number of atoms present in a molecule of a substance is called its_______

For a radioactive sample, determine the ratio of the number of atoms decays of during the first half of its half- life to the number of atoms decays of during the second half of its half cycle.

The half-life of a radioactive sample A is same as the mean life of sample B. The number of atoms present initially in both the samples is same.

A radioactive element disintegrates for a time interval equal to its mean life. The fraction that has disintegrated is

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ATOMS, MOLECULES AND NUCLEI -Exercise 1 (TOPICAL PROBLEMS)
  1. The radioactivity of a sample is l(1) at a time t(1) and l(2) time t(2...

    Text Solution

    |

  2. A radioactive nucleus of mass number A, initially at rest, emits an al...

    Text Solution

    |

  3. In a radioactive disintegration, the ratio of initial number of atoms ...

    Text Solution

    |

  4. The activity of a radioactive sample is measured as 9750 counts per mi...

    Text Solution

    |

  5. A radioactive sample S(1) having the activity A(1) has twice the numbe...

    Text Solution

    |

  6. A radioactive material decays by simulataneous emission of two particl...

    Text Solution

    |

  7. Number of nuclei of a radioactive substance at time t=0 are 2000 and 1...

    Text Solution

    |

  8. The ratio of molecular mass of two radioactive substances is 3//2 and ...

    Text Solution

    |

  9. Number of nuclei of a radioactive substance at time t=0 are 2000 and 1...

    Text Solution

    |

  10. A radioactive isotope has h half-life of 2 yr. how long will itt take ...

    Text Solution

    |

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

    Text Solution

    |

  12. What is the respective number of alpha and beta particles emitted in t...

    Text Solution

    |

  13. Two radioactive materials X(1) and X(2) have decay constants 5 lambda ...

    Text Solution

    |

  14. Activity of a radioactive sample decreases to (1/3)rd of its original ...

    Text Solution

    |

  15. Starting with a sample of pure .^(66)Cu, 7//8 of it decays into Zn in ...

    Text Solution

    |

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

    Text Solution

    |

  17. The ratio of half-life times of two elements A and B is (T(A))/(T(B))....

    Text Solution

    |

  18. The half-life of the isotope .(11)Na^(24), is 15h. How much time does ...

    Text Solution

    |

  19. In aluminium extraction by the Baeyer's process, hv=e^(+)+e^(-) is kno...

    Text Solution

    |

  20. A free neutron decays spontaneously into

    Text Solution

    |