1. If you started out with 800 nuclei and after one hour you had 50, the half life of the nuclei would be …….
a. 15 min?b. 30 min?c. 45 min?d. 60 min
2. If you had 800 mg of a radioisotope with a half-life of five minutes, the amount left after 20 minutes would be
a. 200 mg?b. 100 mg?c. 50 mg?d. 25 mg
3. Au-197 has a half-life of 3.4 hours. If you started out with 100 mg the amount after 17 hours would be
a. 3.125?b. 5.5??c. 50??d. 75??mg.
4. Of the three types of radiation given off by radioactive sources the one with the greatest penetrating power is
a. visible light?b. gamma?c. alpha?d. beta
5. According to the book ionizing radiation can be detected by all of the following except….
a. our eyes b. cloud chambers c. solid-state detectors ?d. scintillation counters
6. A radioisotope we would not want to use in our bodies would be
a. Tc-90, half-life 6.02 hours
b. Tl- 201, half-life 74 hours
c. Cs-137, half-life 30.0 years
d. Yt-90, half-life 64 hours
7. The Co-60 isotope would have
a. 27 protons, 27 electron, and 27 neutrons
b. 27 proton, 27 electrons, and 33 neutrons
c. 33 protons, 60 neutrons, and 33 electrons
d. none of these
8. When Co-60 undergoes beta decay it changes into
a. Ni-58?b. Mn-56?c. Mn-60?d. Ni-60
9. If you were given $1000 dollars and spent one half of it each days, how many days would it take until you were left with $ 31.50 ?
a. 4??b. 5??c. 6??d. 8
10. Cobalt — 60 has a half-life of five years, if you started with 800 mg, how much would you have to replace after 15 years ?
a. 200 mg?b. 400 mg?c. 100 mg?d. 800 mg
11. When Cm-242 is bombarded with alpha particles, Cf-245 and a neutron are formed.
a. An alpha particle is the target nucleus and a neutron is the product nucleus
b. An alpha particle is the projectile and Cm-242 is the target nucleus
c. Cf-245 is the target nucleus
d. a neutron is the projectile
12. When U-238 is bombarded with neutrons Np-239 is formed. What is the ejected particle ?
a. an alpha particle?b. a beta particle?c. a neutron?d. a gamma ray
13. A person is 512 m from a telephone booth. If the person covers half the distance each minute, how long will it take until he or she is 1 m away?
a. 9 min?b. 7 min?c. 10 min?d. 15 min
14. The force that holds the nucleus together is called the
a. electromagnetic?b. magnetic?c. strong?d. weak force.
15. The female physicist who first explained nuclear fission was
a. Lise Meitner??b. Molter?c. Roth??d. Johnson
16. Wisconsin gets
a. none of its electricity from nuclear
b. all of its electricity from nuclear
c. about 1/4 of its energy from nuclear
d. about 1/2 of its energy from nuclear
17. Nuclear power plants are like coal-power plants in that they
a. both create no waste
b. both heat water to make electricity
c. both produce high-level waste
d. both produce a lot of green-house gases
18. When atoms such as U-235 are split into simpler elements by neutron bombardment the process is called
a. fusion?b. fission?c. fishing?d. decay
19. When small atoms such as hydrogen come together to form larger ones and release tremendous amounts of energy in the process the process is called
a. fusion?b. fission?c. chemical change?d. decay
20. The sun and stars continue to shine because their energy source is
a. a chemical reaction?b. fission?c. fusion?d. hydroelectric
21. U-235 is the only isotope of uranium which is fissionable, the number of neutrons in the U-235 isotope would be
a. 143??b. 146??c. 233??d. 92
22. The part of a nuclear reactor which is used to slow down the high speed neutrons so that the are more likely to create fission is called the
a. generator?b. moderator?c. cooling system?d. control rods
23. The part of the nuclear reactor which controls the rate of the chain reaction is called the
a. generator?b. moderator?c. cooling system?d. control rods
24. When the equation U-235 + n = Br-87 + ? is finished the missing particle is
a neutron?b. a proton?c. electron??d. alpha particle
25. The movie we watched in class that talked about the possibility of using fusion to provide the world with cheap energy was called
a. Pretty Woman?b. The Titanic??c. Chain Reaction?d. Major League
| Questions? Comments?? Rick Pladziewicz |
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