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The parent nucleus of (4n + 3) seires i...

The parent nucleus of `(4n + 3)` seires is:

A

`.^(228)Ac`

B

`.^(235)U`

C

`.^(238)U`

D

`.^(237)Th`

Text Solution

Verified by Experts

The correct Answer is:
`(b)`
The `(4n + 3)` series or actinium series has parent element `.^(235)U`
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P BAHADUR-RADIO ACTIVITY-Exercies 3A
  1. The radioactivity of a sample is R(1) at a time T(1) and R(2) at a ti...

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  2. Which nuclear raction is not correct?

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  3. The parent nucleus of (4n + 3) seires is:

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  4. If 5g pf a radioactive substanc ehas t(1//2) = 12hr, 20g of the same s...

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  5. A radioactive istope having a half-line of 3 day was received after 12...

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  6. Radioactive material is deacign with t(1//2) = 30 days on being, separ...

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  7. A radioactive substance has a constant actity of 2000 disintegraion/mi...

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  8. The energy released during the fussion of 1 kg uranium is a)9 xx 10^(2...

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  9. Consider the following process of decay, .(92)^(234)U rarr .(90)^(23...

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  10. The nucleus and an atom can be assumed to be spherical. The relation ...

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  11. A freshly prepared radioactive source to half-life 2 hr, emits radiati...

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  12. Two radio-isotopes P and Q of atomic weight 10 and 20 respetively are ...

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  13. Half-life on an element is 't' secound. In t//2 second the fraction o...

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  14. A radiioactive element X, decays by the sequence and with half-lives, ...

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  15. A radioactive element X has an atomic number of 100. It decays directl...

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  16. When .(17)Cl^(35) undergoes (n,p) reaction, the radioisotope formed is...

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  17. A radioactive isotope has initial activity of 28 dpm Its activity is r...

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  18. The number of beta- particle emitted during the change .(a)X^(c ) rarr...

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  19. The nucler reacion, .(29)^(63)Cu + .(2)^(4)He rarr .(17)^(37)Cl + 14...

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  20. The mass number of a nuclide is 64. What is its nuclear radius?

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