Home
Class 12
PHYSICS
A radioactive element has half-life peri...

A radioactive element has half-life period `800 yr`. After `6400 yr`, what amount will remain?

A

`1/2`

B

`1/16`

C

`1/8`

D

`1/256`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ATOMS AND NUCLEI

    MBD -HARYANA BOARD|Exercise LONG ANSWER TYPE QUESTIONS|3 Videos

  • BOARD QUESTION PAPER (SOLVED) - 2019

    MBD -HARYANA BOARD|Exercise LONG ANSWER TYPE QUESTIONS|4 Videos

Similar Questions

Explore conceptually related problems

A radioactive element has a half life of one day. After three days the amount of the element left will be :

A radioactive element has half-life period of 30 days. How much of it will be left after 90 days?

A radioactive element has half life period of 30 days. How much of it will be left after 90 days?

Initial amount of the radioactive element with half life 10 days is 16 g. What amount in gm of this element will remain after 40 days?

A certain radioactive element has a half-life of 20 years . If we have a block with 10 g of the element in it, after how

The half-life period of a radioactive element is 1 h. After 3 h, what fraction of it will remain?

A radioactive elements has a half life of 2500 yrs. In how many years will its mass decay by 90% of its initial mass?

MBD -HARYANA BOARD-ATOMS AND NUCLEI-OBJECTIVE TYPE QUESTIONS
  1. If an electron jumps from 1st orbital to 3rd orbital, than it will.

    Text Solution

    |

  2. ""(92)U^(238) rarr ""(90)Th^(234) + ""(2)X^(4), what is X ?

    Text Solution

    |

  3. A radioactive element has half-life period 800 yr. After 6400 yr, what...

    Text Solution

    |

  4. In Rutherford scattering experiment, what will b ethe correct angle fo...

    Text Solution

    |

  5. .1 H^1 + .1H^1 + .1H^2 rarr X + .(+1)e^0 + energy. The emitted particl...

    Text Solution

    |

  6. Which of the following isotopes is used for treatment of cancer ?

    Text Solution

    |

  7. If half life of radioactive atom is 2.3 days, then its decay constant ...

    Text Solution

    |

  8. A radioactive element .90 X^238 decay into .83 Y^222. The number of be...

    Text Solution

    |

  9. The ionization of H-atom is :

    Text Solution

    |

  10. The volume occupied by an atom is greater than the volume of the nucle...

    Text Solution

    |

  11. What percentage (approximate) of original radioactive substance left a...

    Text Solution

    |

  12. Which of the following particles has similar mass of electron ?

    Text Solution

    |

  13. If half life period of radium is 1600 years, its average life period w...

    Text Solution

    |

  14. The energy equivalent of one atomic mass unit is

    Text Solution

    |

  15. Hydrogen bomb is based on the principle of

    Text Solution

    |

  16. Energy generation in starts is mainly due to

    Text Solution

    |

  17. Who discovered the nucleus ?

    Text Solution

    |

  18. In nuclear reaction .(4)Be^(9)+.(2)He^(4)rarr.(6)C^(12)+X,X will be

    Text Solution

    |

  19. What does X stand for in the given reaction ? ""(20)Ca^(41) rarr ""(...

    Text Solution

    |

  20. Which of the following series of H-atom lies in visible range?

    Text Solution

    |