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The half life of .^(131)I is 8day. Given...

The half life of `.^(131)I` is 8day. Given a sample of `.^(131)1` at `t = 0`, we can assert that:

A

No mucleus wil decay `t = 4` day

B

No nucleus will decay before `t = 8` day

C

All nuclei will decay before `t = 16` day

D

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

Text Solution

Verified by Experts

The correct Answer is:
`(d)`
The decay of radioactive species takes place after `t = 0`
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P BAHADUR-RADIO ACTIVITY-Exercies 3A
  1. In the nuclear chain ractio: .(92)^(235)U + .(0)^(1)n rarr .(56)^(1...

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  2. One mole of A present in a closed vessel undergoes decay as: .(Z)^(A...

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  3. The half life of .^(131)I is 8day. Given a sample of .^(131)1 at t = 0...

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  4. Number of neutrons i8n a parent nucleus X, which gives .(7)^(14)N afte...

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  5. The activity fo a radio nuclide (.^(100)X) is 6.023 cuire. If the d...

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  6. Sulphur 35(34,96903 amu) emits a beta- particles but no gamma-rays. Th...

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  7. A radioactive element A decays with a decay constant lambda. The fract...

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  8. Which of the following can show gamma- emission?

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  9. gamma radiations form a radioactive element may be produced:

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  10. Which of the following statement is wrong?

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  11. Which of the following statements is wrong?

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  12. Which of the following statements is wrong?

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  13. If E(e) is the energy needed to remove an electron from atom and E(n) ...

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  14. Nuclear reacations either exoeerge or endoregic shows the exchange of:

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  15. The reaction, .(13)^(27)Al + .(2)^(4) He rarr .(14)^(30)S + .(1)^(1)H:

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  16. .(6)^(11) C on decay produces:

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  17. One important source of energy of volacans erruption is:

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  18. The decay of mass during nuclear fusion and nuclear fission are respec...

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  19. If equal number of atom of two radioactive elements are consisdered, t...

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  20. As an alpha- paricle approaches a .(7)N^(14) nuclesus, the potential e...

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