Home
Class 12
PHYSICS
10^(-3) kg of a radioactive isotope (ato...

`10^(-3) kg` of a radioactive isotope (atomic mass 226) emits `3.72xx10^(10) alpha`- particles in a second. Calculate the half-life of the isotope. If `4.2xx10^(2)` joule energy is released in one hour in this process what is the average energy of the `alpha`-particles? Avogadro number is `6.02xx10^(26)//` kmol and `log_(e)2 =0.693`.

Promotional Banner

Topper's Solved these Questions

  • ATOMS, NUCLEI AND MOLECULES

    SL ARORA|Exercise Problems For Self Practice|87 Videos

  • ATOMS, NUCLEI AND MOLECULES

    SL ARORA|Exercise Problems For Self Practice|87 Videos

  • AC CIRCUITS AND ELECTRIC CIRCUITS

    SL ARORA|Exercise problem|57 Videos

  • CAPACITORS

    SL ARORA|Exercise problem for self practive|65 Videos

Similar Questions

Explore conceptually related problems

Find the half life of U^(238) , if one gram of it emits 1.24xx10^4 alpha -particle per second. Avogadro's Number =6.023xx10^(23) .

Calculate t_(3//2) for Am^(241) in years given that it emits 1.2 xx 10^(11) alpha -particles per gram per second

One gram ofo a radioactive substance disintegrates at the rate of 3.7 xx10^(10) disintegarations per second. The atomic mass of the subsatnce is 226 . Calculate its mean life.

A body of mass 10g executes SHM with amplitude 2 xx 10^(-2) m and time period 2 s Calculate the energy of the particle.

The atomic weight of radius is 226. It is observed that 3.67 xx 10^(10) " " alpha- particles are emitted per second from one gram of radium. Calculate in years the half period of radium.

An alpha- particle of mass 6.65xx10^(-27) kg travels perpendicular to a magnetic of 0.2 T with a speed of 6xx10^(5)ms^(-1) . Calculate the acceleration of the alpha- particle. Given the charge on the electron is 1.6xx10^(-19)C .

The half -life of a radioactive substance is 1.192 xx 10^(7) s against alpha- decay. Calculate the decay rate for 3.18 xx 10^(15) atoms of the substance

The flux of alpha- particle at 2^@ is 1 xx 10^6 . The flux of alpha- particle at angle 60^@ is

SL ARORA-ATOMS, NUCLEI AND MOLECULES-Problem
  1. The wavelength of the first line of Lyman series for hydrogen is ident...

    Text Solution

    |

  2. Two hydrogen-like atoms A and B are of different masses and each atom ...

    Text Solution

    |

  3. The stopping potential for the photo-electrons emitted from a metal su...

    Text Solution

    |

  4. Light form a dicharge tube containing hydrogen atoms falls on the surf...

    Text Solution

    |

  5. An electron in the ground state of hydrogen atom is revolving in antic...

    Text Solution

    |

  6. A sample contains 10^(-2)kg each of two substances A and B with half l...

    Text Solution

    |

  7. The disintegration rate of a certain radioactive sample at any instant...

    Text Solution

    |

  8. At a given instant there are 25% undecayed radioactive nuclei in a sam...

    Text Solution

    |

  9. The isotope of U^(238) and U^(235) occur in nature in the ratio 140:1....

    Text Solution

    |

  10. The mean lives of a radioactive substance are 1620 years and 405 years...

    Text Solution

    |

  11. Some amount of a radioactive substance (half-life= 10 days) is spread ...

    Text Solution

    |

  12. A small quantity of solution containing Na^(24) radio nuclide (half-li...

    Text Solution

    |

  13. In the chemical analysis of a rock the mass ratio of two radioactive i...

    Text Solution

    |

  14. A sample of uranium is a mixture of three isotopes .(92)U^(234), .(92)...

    Text Solution

    |

  15. 10^(-3) kg of a radioactive isotope (atomic mass 226) emits 3.72xx10^(...

    Text Solution

    |

  16. Nuclei of radioactive element A are being produced at a constant rate...

    Text Solution

    |

  17. The element curium .96^248 Cm has a mean life of 10^13s. Its primary d...

    Text Solution

    |

  18. A nuclear reactor generates power at 50% efficiency by fission of .(92...

    Text Solution

    |

  19. A star initially has 10^(40) deuterons. It produces energy via the pr...

    Text Solution

    |

  20. A fusion reaction of the type given below .(1)^(2)D+.(1)^(2)D rarr ....

    Text Solution

    |