U and an alpha particle c. H and H He and H d. H and a neutron 1. Which of the following statements are characteristic of an alpha particle? I. It is positively charged. II. It has no mass or charge. III. It's symbol is 0-1e. IV. It has poor penetrating ability I only d. I and IV II only e. II and IV III only 2. Deuterium (2H) is common product of the fusion process. Often called “heavy hydrogen”, deuterium consists of one proton and neutron. Which of the following atoms could undergo fusion to become deuterium? U and an alpha particle c. H and H He and H d. H and a neutron

3. The half-life of francium-212 is 19 minutes 3. The half-life of francium-212 is 19 minutes. How many minutes will it take for 1 gram of this isotope to decay to 0.125 grams? 4.75 minutes c. 38 minutes 9.5 minutes d. 57 minutes 4. The half-life of cadmium-109 is 464 days. A scientist measures out a 256.0 g sample. Approximately how many grams of cadmium-109 would remain after 1,392 days? 32.0 g c. 2,048.0 g 64.0 g d. 1,024.0 g

A. What is the half-life of a 100 A. What is the half-life of a 100.0 g sample of nitrogen-16 that decays to 12.5 g of nitrogen-16 in 21.6 s? B. If the half-life of iodine-131 is 8.10 days, how long will it take a 50.00 g sample to decay to 6.25 g? c. Potassium-42 has a half-life of 12.4 hours. How much of an 848 g sample of potassium-42 will be left after 62.0 hours?

5. Which of the following correctly balances this nuclear fission reaction?

6. Nuclear fission is a powerful energy source, used in both nuclear power plant and atomic bombs. Which statement is a possible description of the nuclear fission of U-235? U-235 absorbs one neutron and splits into an atom of krypton-94 and an atom of barium-139. U-235 absorbs one neutron and splits into an atom of krypton-94, an atom of barium-139 and three neutrons. U-235 absorbs one neutron and splits into an atom of krypton-94, an atom of barium-139, and two neutrons. U-235 absorbs one neutron and splits into an atom of krypton-94, an atom of barium-139 and one neutron.

7. Where would you find a nuclear fusion reaction occurring? In a nuclear power plant In the Sun In an X-ray machine In a microwave oven 8. The beta decay of cesium-137 has a half-life of 30 years. How many years must pass to reduce a 25mg sample of cesium 137 to 6.25 mg? 30 years C. 75 years 60 years D. 90 years

9. Identify an element that cannot participate in nuclear fission reactions. Plutonium C. Uranium Hydrogen D. Thorium 10. Fission and fusion are two methods of producing nuclear energy. Which method is used in nuclear power reactors and why? Fusion, because it creates less waste. Fission, because it produces more energy per atom of fuel. Fusion, because it produces more energy per atom of fuel. Fission, because fusion requires a large input of energy in order to occur.