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Name the atoms of a substance having sam...

Name the atoms of a substance having same atomic number, but different mass numbers. Give one example of such a substance. How do the structures of such atoms differ ?

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ICSE-RADIOACTIVITY-EXERCISE-12(A)
  1. (i) What are isobars? (ii) Give one example of isobars.

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  2. What is the name given to elements with same mass number and different...

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  3. Name the atoms of a substance having same atomic number, but different...

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  4. What is meant by Radioactivity ?

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  5. A radioactive substance is oxidised. What changes would you expect to ...

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  6. A radioactive source emits three type of radiations. (a) Name the th...

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  7. Answer the following questions. (a) Name the radiation of zero mass....

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  8. The diagram in Fig. shows a radioactive source S placed in a thick lea...

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  9. Fig. 12.8 shows a mixed source R of alpha and beta particles in a thic...

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  10. Explain why alpha and beta particles are deflected in an electric or a...

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  11. Explain why alpha and beta particles are deflected in an electric or a...

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  12. State following four properties each of alpha, beta and gamma radiatio...

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  13. Compare the ionising power of alpha, beta and gamma radiations.

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  14. State the speed of each of alpha, beta and gamma radiations.

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  15. (a) What is the composition of alpha, beta and gamma radiations? (b) C...

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  16. How are gamma radiations produced ? Mention two common properties of t...

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  17. An alpha-particle captures (i) one electron, (ii) two electrons. In ea...

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  18. Radioactivity is a nuclear phenomenon'. Comment on this statement.

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  19. What kind of change takes place in a nucleus when a gamma-particle is ...

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  20. A certain radioactive nucleus emits a particle that leaves its mass nu...

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