1. Project By: Clare Dwyer, Paige Locastro, Ryan O’Hara

2. Which particle has the greatest mass? An alpha particle A beta particle An electron A neutron

4. Which radioactive emanations have a charge of 2+? Alpha particlesGamma rays Beta particlesNeutrons

6. Bombarding a nucleus with high- energy particles that change it from one element into another is called… A half-reactionA breeder reaction Artificial Transmutation Natural Transmutation

8. As the temperature increases, pressure remaining constant, the half- life of a radioactive element… DecreasesIncreases Remains the sameDepends on the mass

10. Which species has a negative charge? A lithium ionAn alpha particle An aluminum ionA beta particle

12. Samples of elements that are radioactive must contain atoms With stable nuclei With unstable nuclei In the excited stateIn the ground state

14. A radioactive element has a half-life of 2 days. Which fraction represents the amount of an original sample of this element remaining after 6 days? 1/81/3 1/21/4

16. Write the balanced nuclear equation for…… Beta decay of Pb-210 AND Alpha decay of Au-185

17. 210 82 Pb 0 -1 e + 210 83 Bi AND 185 79 Au 4 2 He + 181 77 Ir

18. Compared to an ordinary chemical reaction, a fission reaction will Release smaller amounts of energy Release larger amounts of energy Absorb smaller amounts of energy Absorb larger amounts of energy

20. Which statement explains why fusion reactions are difficult to initiate? Positive nuclei attract each other Positive nuclei repel each other Neutrons prevent nuclei from getting close enough to fuse Electrons prevent nuclei from getting close enough to fuse

22. Which list can all particles be accelerated by an electric field? Beta particles, protons, neutrons Alpha particles, beta particles, and neutrons Alpha particles, beta particles, and protons Alpha particles, protons, neutrons

24. Given the nuclear equation: 58 29 Cu 58 28 Ni + X what nuclear particle is represented by X?

26. When a radioactive nucleus emits a beta particle, the atom’s Mass number is increased by 1 Mass number is decreased by 1 Atomic number is increased by 1Atomic number is decreased by 1

28. If 12.5 grams of cesium-137 remained after 90.69 years, what was the mass of the original sample?

30. A sample of wood is found to contain 1/8 as much C -14 is present in the wood of the living tree. What is the approximate age, in years, of the wood?

31. 17,900 years