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Alpha rays emitted from a radioactive su...

Alpha rays emitted from a radioactive substance are

A

Uncharged particles having the mass equal to electron

B

Uncharged particles having the mass equal to proton

C

Ionised hydrogen nuclei

D

Doubly ionised helium atom

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The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-NUCLEI-Assignment Section A Objective (One option is correct )
  1. The percentage of quantity of a radioactive material that remains afte...

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  2. Beta rays emitted by a radicactive material are

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  3. Alpha rays emitted from a radioactive substance are

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  4. In a given reaction, ""(Z)X^(A)to(Z+1)Y^(A)to(Z-1)K^(A-4)to(Z-1)K^(A...

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  5. The radioactivity of a certain radioactive elements drops to 1/(64) ...

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  6. If the half life of a radioactive is T. then the fraction that would r...

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  7. The half-life of a radioactive element which has only 1//32 of its ori...

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  8. The half-life of Bi^210 is 5 days. What time is taken by (7//8)^th par...

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

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  10. Half-life of radioactive element depend upon

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  11. The half-life period of a radioactive substance is 5 min. The amount o...

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  12. Half-lives of two radioactive substances A and B are respectively 20 m...

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  13. Half-life of a radioacitve element is 10 days. The time during which q...

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  14. An element A decays into an element C by a two step process A to B + ....

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  15. During mean life of a radioactive element, the fraction that disintegr...

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  16. The half-life of a radioactive substance against alpha-decay is 1.2 xx...

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  17. The activity of a sample of radioactive material is R(1) at time t(1)a...

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  18. A radioactive substance has an average life of 5 hours. In a time of 5...

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

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  20. The half-life of a sample of a radioactive substance is 1 h. If 8xx10^...

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