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When .90 Th^228 transforms to .83 Bi^212...

When `._90 Th^228` transforms to `._83 Bi^212`, then the number of the emitted `alpha-`and `beta-`particle is, respectively.

A

`4 alpha , 7 beta`

B

` 4 alpha , 1 beta `

C

` 8 alpha, 7 beta `

D

`4 beta , 4 alpha`

Text Solution

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The correct Answer is:
B
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MOTION-RADIOACTIVITY & NUCLEAR PHYSICS-Exercise -1
  1. There are two radio nuceli A and B. A is an alpha emitter and B a beta...

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  2. The number of alpha and beta- emitted during the radioactive decay cha...

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  3. When .90 Th^228 transforms to .83 Bi^212, then the number of the emitt...

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  4. A radioactive nucleus undergoes a series of decay according to the sch...

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  5. The particles not emitted by radioactive susbstace are:

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  6. gamma- rays are produced ………. , alpha or beta- decay

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  7. The particle emitted in the nuclear reaction .(Z) X^(A) = .(Z+1)...

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  8. By neutrino hypothesis which conservation law for beta- decay c...

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  9. During a negative beta decay,

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  10. In a given magnetic field for the particle less of same velocit...

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  11. A nucleus with mass number m and atomic number n, emits one al...

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  12. The intensity of gamma- from a source (I(0)) reduces to I(0)//8 af...

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  13. The inteisity of gamma radiation from a given source is I(0) . ...

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  14. The graph between remaining radioactive atoms and time for a r...

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  15. The following is not and application of radioactive material -

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  16. In which of the following we don't use a radioactive isotope :

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  17. The reason of origin of gamma- rays is

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  18. A radioactive material of half-life T was kept in a nuclear reactor at...

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  19. Let u denote one atomic unit .one atom of an element of mass number A ...

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  20. The surface area of a nucleus varies with mass number A as

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