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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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**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% If a radioactive sample goes through 1 half life, what percent of the sample is left?**$600**1/16 = 6.25% • A sample goes through 4 half lives. What fraction of the sample remains? What percent remains?**$800**10g • The half-life of K-42 is 12.4 hours. How much of a 320g sample is left after 62 hours**$1000**2 • 60g sample of N-16 decays to 15g in 14.4 seconds. How many half lives does it go through?**$200**False • True or False: A radioactive particle gets bombarded by a particle in natural transmutation**$400**147N 146C 0-1e + ________**$600**42He 23090Th _____ 22688Ra**$800**1910Ne _____ 0+1e + 199F**$1000**0+1e + 3719K • 3720Ca ______ + _______**$200**• True • True or False: A radioactive particle gets bombarded by a particle in artificial transmutation**$400**Fusion • Name this type of AT is • 21H +11H 42He + 2 11H + energy**$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?**$1000**Ba-138 A barium-137 atom is bombarded with a neutron. What isotope is formed?**$200**• 42He • draw the notation for an alpha particle**$800**Fission • Name this type of AT • 23592U +10n 143Ba + 90Kr + 3 10n + energy**$400**0-1e • draw the notation for a B- (beta)**$600**0+1e • draw the notation for the B+ (positron)**$800**gamma or neutron This particle does not affect the atomic number**$1000**Gamma, no charge • This particle does not affect the atomic number or the mass number, what is its charge**$200**• U-235 This isotope is used for making atomic bombs**$400**C-14 • This isotope is usually used for relative dating of fossils**$600**Mold (spores) and bacteria • Foods are irradiated to kill these**$800**• cancer treatment, energy, treating food Name one good use of radioactive isotopes**$1000**C-14 p=6 and n=8 Not a 1 to 1 ratio C-14 vs N-14 Which is radioactive and why**$200**answer question**$400**answer question**$600**answer question**$800**answer question**$1000**answer question**$400**answer question**$800**answer question**$1200**answer question**$1600**answer question**$2000**answer question**$400**answer question**$800**answer question**$1200**answer question**$1600**answer question**$2000**answer question**$400**answer question**$800**answer question**$1200**answer question**$1600**answer question

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