Home
Class 12
CHEMISTRY
A 1.0-mg sample of technetium-99 has an ...

A 1.0-mg sample of technetium-99 has an activity of `1.7 xx 10^(-5) Ci` decaying by `beta` -emission. What is the decay constant for `""_43^99Tc` ?

Text Solution

Verified by Experts

`1.0 xx 10^(-13) //s `
Promotional Banner

Topper's Solved these Questions

  • MISCELLANEOUS OBJECTIVE QUESTIONS

    RC MUKHERJEE|Exercise MCQ|277 Videos

  • MOLECULAR WEIGHT

    RC MUKHERJEE|Exercise PROBLEMS |12 Videos

Similar Questions

Explore conceptually related problems

A sample of a radioactive element that contains 1.0 xx 10^(3) nuclie decays to 6.2 xx 10^(1) nuclei in 10minutes . What is its sepecific decay constant?

Radioactive 138I has a half-life of 8.0 days .A sample containing 138I has activity 20 mu Ci at t=0.(a) What is its activity at t=4.0 days?(b) What is its decay constant at t=4.0 days?

A sample of radioactive material A, that has an activity of 10 mCi(1 Ci=3.7xx10^(10)decays//s) , has twice the number of nuclei as another sample of a different radioactive material B which has an activity of 20 mCi. The correct choices for half-lives of A and B would then be respectively :

A radioactive sample has an activity of 5.13xx10^(7)Ci . Express its activity in 'becqueral' and 'rutherford'.

The decay constant of a radioactive element is 1.05xx10^(-4) / year. What is its half life ?

Decay constant of a reaction is 1.1 xx 10^(-9)//sec , then the half-life of the reaction is

The mean lives of a radioactive substance are T^(1) and T^(2) for alpha- emission and beta- emission respectively. If it is decaying by both beta- emission and beta - emission simultaneously then find its mean life and decay constant ?

RC MUKHERJEE-MISCELLANEOUS PROBLEMS FOR REVISION-SUBJECTIVE TYPE QUESTIONS
  1. Calculate the effective neutron capture radius of a nucleus having a c...

    Text Solution

    |

  2. New industrial plants for acetic acid react liquid methanol with carbo...

    Text Solution

    |

  3. A 1.0-mg sample of technetium-99 has an activity of 1.7 xx 10^(-5) Ci ...

    Text Solution

    |

  4. The nuclide ""^227Ac undergoes beta emission (98.6%) or a emission ...

    Text Solution

    |

  5. Crystals of AgBr can be removed from black-and-white photographic film...

    Text Solution

    |

  6. One of the hazards of nuclear explosion is the generation of .^(90)Sr ...

    Text Solution

    |

  7. A 0.239 g sample of unknown organic base is dissolved in water and tit...

    Text Solution

    |

  8. A 0.50-g mixture of Cu2O and CuO contains 0.425 g of Cu. What is the m...

    Text Solution

    |

  9. An alloy of iron (54.7%), nickel (45.0%) and manganese (0.3%) has a de...

    Text Solution

    |

  10. (a) Calculate the equilibrium constant for the following reaction at 2...

    Text Solution

    |

  11. Calculate the equilibrium constant for the following reaction at 25^@C...

    Text Solution

    |

  12. When equal volumes of 1.0 M solutions of Ag^+ and Fe^(2+) are mixe...

    Text Solution

    |

  13. The thermochemical equation for the dissociation of hydrogen gas into ...

    Text Solution

    |

  14. A mixture of N2 and Ne contains equal moles of each gas and has a tot...

    Text Solution

    |

  15. Calculate the hydronium-ion concentration and the sulphide ion concent...

    Text Solution

    |

  16. Calculate [SO4^(2-) ] in 0.15 M H2SO4 solution if the first step of ...

    Text Solution

    |

  17. Under standard conditions for all concentrations, the following reacti...

    Text Solution

    |

  18. An electrode is prepared by dipping an Ag strip into a solution satura...

    Text Solution

    |

  19. An ideal gas with density of 3.0 g/L has pressure of 675 mmHg at 25^@C...

    Text Solution

    |

  20. Under standard conditions for all concentrations, the following reacti...

    Text Solution

    |