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# Final Jeopardy

Final Jeopardy. Final Jeopardy Category. Final Jeopardy. answer. question. \$200. half life. The amount of time it takes for a radioactive sample to decay to ½ of itself original mass is called_____. \$400. 50%.

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## Final Jeopardy

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1. Final Jeopardy Final Jeopardy Category

3. \$200 half life • The amount of time it takes for a radioactive sample to decay to ½ of itself original mass is called_____

4. \$400 50% If a radioactive sample goes through 1 half life, what percent of the sample is left?

5. \$600 1/16 = 6.25% • A sample goes through 4 half lives. What fraction of the sample remains? What percent remains?

6. \$800 10g • The half-life of K-42 is 12.4 hours. How much of a 320g sample is left after 62 hours

7. \$1000 2 • 60g sample of N-16 decays to 15g in 14.4 seconds. How many half lives does it go through?

8. \$200 False • True or False: A radioactive particle gets bombarded by a particle in natural transmutation

9. \$400 147N 146C 0-1e + ________

10. \$600 42He 23090Th  _____ 22688Ra

11. \$800 1910Ne _____ 0+1e + 199F

12. \$1000 0+1e + 3719K • 3720Ca  ______ + _______

13. \$200 • True • True or False: A radioactive particle gets bombarded by a particle in artificial transmutation

14. \$400 Fusion • Name this type of AT is • 21H +11H 42He + 2 11H + energy

15. \$600 • Alpha is positive and so is the nucleus, they want to repel • Why was an alpha particle have to bombard a nucleus at really high speeds?

16. \$1000 Ba-138 A barium-137 atom is bombarded with a neutron. What isotope is formed?

17. \$200 • 42He • draw the notation for an alpha particle

18. \$800 Fission • Name this type of AT • 23592U +10n 143Ba + 90Kr + 3 10n + energy

19. \$400 0-1e • draw the notation for a B- (beta)

20. \$600 0+1e • draw the notation for the B+ (positron)

21. \$800 gamma or neutron This particle does not affect the atomic number

22. \$1000 Gamma, no charge • This particle does not affect the atomic number or the mass number, what is its charge

23. \$200 • U-235 This isotope is used for making atomic bombs

24. \$400 C-14 • This isotope is usually used for relative dating of fossils

25. \$600 Mold (spores) and bacteria • Foods are irradiated to kill these

26. \$800 • cancer treatment, energy, treating food Name one good use of radioactive isotopes

27. \$1000 C-14 p=6 and n=8 Not a 1 to 1 ratio C-14 vs N-14 Which is radioactive and why