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

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

A

No nucleus will decay at t=4day

B

No nucleus will decay before t=8day

C

All nucleus will decay before t=16day

D

A given nucleus may decay before

Text Solution

Verified by Experts

The correct Answer is:
d
`""_(4)""^(9)Be+gammato""_(4)""^(8)Be+""_(0)""^(1)n`
`""_(4)""^(9)Be+""_(1)""^(1)H`
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NARAYNA-NUCLEAR CHEMISTRY-NCERT BASED
  1. Half life period of ""(53)I""^(125) is 60 days. Percentage of radioact...

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  2. Among the following for which one rate of decay is maximum

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  3. During a negative beta-decay

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  4. Identify the missingf product in the given reaction ""(92)""^(235)Uto"...

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  5. The half life period of a radioctive element is 140 days. Afte 560 day...

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  6. A photon of gamma radiation knocks out a proton from ""(12)Mg""^(24) n...

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  7. Decrease in atomic number is observed during

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  8. Which of the following pairs are isodiapteric pairs?

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  9. The radius ""(Z)M""^(4) nucleus is (outer most configuration 3s""^(2)3...

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  10. Correct statement is/are

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  11. The half life of I""^(131) is 8 day. Given a sample of I""^(131) at t=...

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  12. Select the correct statement(s)

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  13. A positron is emitted from .(11)Na^(23) . The ratio of the atomic mass...

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  14. In the transformation of ""(92)""^(238)U to ""(92)""^(234)U, if one em...

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  15. Which of the following pairs are isodiaphers

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  16. .^(23) Na is the more stable isotope of Na. Find out the process by wh...

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  17. The half life of ""(6)C""^(14), if decay constant 6.31xx10^(-4) year^...

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  18. .(13)Al^(27) is a stable isotope. .(13)Al^(29) is expected to disinteg...

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  19. Which of the following is not correct

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  20. Identify the incorrect statements is/are

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