Radioactivity

1. How are radiations emitted by radioactive elements identified?

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2. Define radioactivity

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3. Gamma rays penetration power is only stopped by what material?

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4. Gamma radiations have the highest penetration effect followed by beta particles then alpha particles. True or False?

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5. Alpha particles are heavier than beta particles hence less deflected in a magnetic field compared to beta particles?

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6. The limit of the penetration power of Beta particles is what material?

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7. Mention the precautions of handling radioactive elements

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8. The no. of protons in the nucleus is called the Atomic Number. True or False?

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9. Explain what occurs when an Alpha particle is emitted?

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10. Ionization effect is when alpha, beta or Gamma radiation knock off electrons from air molecules resulting in the formation of positive ions?

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11. Positively charged radioactive emissions are called?

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12. State the applications of radioactivity?

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13. The penetration power of Alpha particles can be stopped by what material?

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14. Which of the following does NOT occur when a Beta particle is emitted?

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15. When a nucleus is bombarded and it splits it is said to have undergone?

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16. Which of the following is not among some of the hazards of radiation?

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17. Explain what occurs when Gamma radiation is emitted?

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18. Give the main difference between X-rays and Gamma rays?

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19. Negatively charged radioactive emissions are called?

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20. The uncharged radioactive emissions are called?

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21. State the Decay Law

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22. Atoms which have the same atomic number but different mass number are called?

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23. Name some of the sources of background radiation?

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24. The sum of protons and neutrons is called the Mass number?

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25. Which of the following statement is CORRECT about Nuclear Fission?

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26. Mention the radioactive emission which has the weakest ionizing power

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27. Mention the 2 cloud chambers used to detect and observe the effect of the ionization of particles by radiations?

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28. Background radiation is the presence of radiation even in the absence of a radioactive source. True or False?

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29. Which of the following statement is INCORRECT about Nuclear fusion?

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30. Give the formula of Half-life of a radioactive element?

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31. Which of the following statements is CORRECT about radioactive decay?

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32. The time taken for half the number of nuclides initially present in a radioactive sample to decay is called HALF-LIFE. True or False?

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33. Which radioactive emission has the strongest ionizing power?

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34. The fusing together of nuclei to form a heavier nucleus is called?

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