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Answer the following question: Define r...

Answer the following question:
Define radioactivity: What are radioactive substances? Name the scientist who discovered radioactivity.

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NAVNEET PUBLICATION-SUBSTANCES IN COMMON USE-EXERCISE
  1. What are detergents?

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  2. Which chemicals and apparatus will you use in the laboratory for makin...

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  3. Answer the following question: Define radioactivity: What are radioac...

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  4. What is meant by radioactivity?

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  5. Answer the following question: Mention the names of four scientists w...

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  6. Answer the following question: Give four examples of radioactive elem...

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  7. Answer the following question: Give four examples of radioactive elem...

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  8. Answer the following question: Give four examples of radioactive elem...

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  9. State properties of alpha rays.

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  10. Answer the following question: State any three characterstic properti...

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  11. Answer the following question: State any three characterstic properti...

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  12. Answer the following question: When is the nucleus said to be unstabl...

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  13. Answer the following question: State three used of radiactive isotope...

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  14. Give the uses of radioactive isotopes in Field of agriculture.

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  15. Answer the following question: State three uses of radioactive isotop...

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  16. Write the uses of : Radioactive substances

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  17. Answer the following question: Write the harmful effects of radioacti...

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  18. What problems do you get after playing colours on Rang Panchami?

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  19. What problem do you have on painting the house and furniture?

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  20. Answer the following question: Write the harmful effects of artifical...

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