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What is the respective number of alpha a...

What is the respective number of `alpha` and `beta` particles emitted in the following radioactive decay? `""_(90)X^(200) rarr ""_(80)Y^(168)`

A

6 and 8

B

8 and 8

C

6 and 6

D

8 and 6

Text Solution

Verified by Experts

The correct Answer is:
B
In 2 s only 90% nuclei are left behind. Thus, in next 2 s 90% of 900 or 810 nuclei will be left.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ATOMS, MOLECULES AND NUCLEI -Exercise 1 (TOPICAL PROBLEMS)
  1. A radioactive isotope has h half-life of 2 yr. how long will itt take ...

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  2. A sample of a radioactive element has a mass of 10 g at an instant t=0...

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  3. What is the respective number of alpha and beta particles emitted in t...

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  4. Two radioactive materials X(1) and X(2) have decay constants 5 lambda ...

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  5. Activity of a radioactive sample decreases to (1/3)rd of its original ...

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  6. Starting with a sample of pure .^(66)Cu, 7//8 of it decays into Zn in ...

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  7. Which of the following cannot be emitted by radioactive substances dur...

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  8. The ratio of half-life times of two elements A and B is (T(A))/(T(B))....

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  9. The half-life of the isotope .(11)Na^(24), is 15h. How much time does ...

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  10. In aluminium extraction by the Baeyer's process, hv=e^(+)+e^(-) is kno...

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  11. A free neutron decays spontaneously into

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  12. In the nuclear reaction ""(7)N^(14)+X to ""(6)C^(14)+""(1)H^(2), the X...

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  13. ""(92)U^(238) on absorbing a neutron goes over to ""(92)U^(239). This ...

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  14. IF in a nuclear fission, piece of uranium of mass 5.0g is lost, the en...

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  15. The energy released by the fission of one uranium atom is 200 MeV. The...

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  16. An alpha-particlee of mass m suffers one dimensional elastic collision...

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  17. The operation of a nuclear reactor is said to be critical, if the mult...

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  18. On bombardment of U^235 by slow neutrons, 200 MeV energy is released. ...

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  19. The binding energies of the atoms of elements A and B are E(a) and E(b...

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  20. If 200 MeV of energy is released in the fission of 1 nucleus of ""(92)...

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