Home
Class 12
PHYSICS
The half - life of I^(131) is 8 days. Gi...

The half - life of `I^(131)` is 8 days. Given a sample of `I^(131)` at time `t = 0` , we can assert that

A

No nucleus will decay before `t=4` days

B

No nucleus will decay before `t=8` days

C

All nuclei will decay before `t=16` days

D

A given nucleus may decay at any time after `t=0`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • NUCLEAR PHYSICS

    RESONANCE ENGLISH|Exercise Exercise 2 Part-1 Only one option correct type|20 Videos

  • NUCLEAR PHYSICS

    RESONANCE ENGLISH|Exercise Exercise-2 Part -2 Single and double value interger type|15 Videos

  • NUCLEAR PHYSICS

    RESONANCE ENGLISH|Exercise Exercise -1 Part-1 Subjective questions|12 Videos

  • GRAVITATION

    RESONANCE ENGLISH|Exercise HIGH LEVEL PROBLEMS|16 Videos

  • REVISION DPP

    RESONANCE ENGLISH|Exercise All Questions|463 Videos

Similar Questions

Explore conceptually related problems

The half-life of Bi^210 is 5 days. What time is taken by (7//8)^th part of the sample of decay ?

The life-life of Bi^210 is 5 days. What time is taken by (7//8)^th part of the sample of decay ?

The half-life of radon is 3.8 days. After how many days 19/20 of the sample will decay ?

The half life of radioactive Radon is 3.8 days . The time at the end of which (1)/(20) th of the radon sample will remain undecayed is (given log e = 0.4343 )

The half life of radioactive Radon is 3.8 days . The time at the end of which (1)/(20) th of the radon sample will remain undecayed is (given log e = 0.4343 )

The half-life of Tc^(99) is 6.0 hr. The total residual activity in a patient 30 hr after receiving an injection containing Tc^(99) must be more than 0.01 muC_(i) . What is the maximum activity ("in"muC_(i)) that the sample injected can have?

Radon, ._(86)^(222)Rn , is a radioactive gas that can be trapped in the basement of homes, and its presence in high concnetrations is a known health hazard. Radon has a half-life of 3.83 days . A gas sample contains 4.0 xx 10^(8) radon atoms initially. (a) How many atoms will remain after 12 days have passed if no more radon leaks in? (b) What is the initial activity of the radon sample?

I^131 is used for the treatment of

A radioactive isotope X has a half life of 3 seconds. At t=0, a given sample of this isotope contains 8000 atom. Calculate (i) its decay constant (ii) average life (iii) the time t_1 , when 1000 atoms of the isotope X remain in the sample (iv) number of decay/sec in the sample at t=t_1sec.

A sample contains 16 gm of radioactive material, the half-life of which is two days. After 32 days, the amount of radioactive material left in the sample is

RESONANCE ENGLISH-NUCLEAR PHYSICS-Exercise-1 Part-2 Only one option correct type
  1. Calculate the energy of the reaction Li^7+ prarr22He^4 If the binding...

    Text Solution

    |

  2. Atomic weight of boron is 10.81 and it has twoisotopes .(5)^(10)B and ...

    Text Solution

    |

  3. Which of the following processes does not represent a gamma decay ?

    Text Solution

    |

  4. An alpha particle is bombarded on .^(14)N. As a result , a .^(17)O nuc...

    Text Solution

    |

  5. A fre neutron decays into a proton an electron and

    Text Solution

    |

  6. Nuclei X decay into nuclei Y by emitting alpha-aprticles. Energies of ...

    Text Solution

    |

  7. In one average-life,

    Text Solution

    |

  8. A freshly prepared radioactive source of half-life 2 h emits radiation...

    Text Solution

    |

  9. Two isotopes P and Q atomic weight 10 and 20, respectively are mixed i...

    Text Solution

    |

  10. Ten grams of ^57 Co kept in an open container beta-decays with a half-...

    Text Solution

    |

  11. A radioactive element P disintegrates into Q which further disintegrat...

    Text Solution

    |

  12. The half - life of I^(131) is 8 days. Given a sample of I^(131) at ti...

    Text Solution

    |

  13. 92^(U^(235) mucleus absorbs a slow neutron and undergoes fission into ...

    Text Solution

    |

  14. Two lithium nuclei in a lithium vapour at room temperature do not comb...

    Text Solution

    |

  15. In a uranium reactor whose thermal power is P=100 MW, if the average n...

    Text Solution

    |

  16. Choose the statement which is true.

    Text Solution

    |

  17. Fusion reaction takes place at high tamperature because

    Text Solution

    |

  18. in a fission reaction of X and Y is 8.5 MeV , whereas of ""^(236)...

    Text Solution

    |

  19. A heavy nucleus X of mass number 240 and binding energy per nucleon 7....

    Text Solution

    |

  20. Assuming that about 20 MeV of energy is released per fusion reaction ...

    Text Solution

    |