1. Nuclear Chemistry 1997 D By: Stephanie Chen and Stephanie Ng

2. 1997 D Answer each of the following questions regarding radioactivity.

3. 1997 D (a) Write the nuclear equation for decay of 234Pu by alpha emission.

4. 1997 D (a) ANSWER  + 234 Pu 94 4 He 2 230 X 92

5. 1997 D (b) Account for the fact that they total mass of the products of the reaction in part (a) is slightly less than that of the original a 234Pu.

6. 1997 D (b) ANSWER The total mass of the products of the reaction in part (a) is slightly less than that of the original a(234,94) Pu because of the Binding Energy in order for fission to occur, there must be a release of neutrons, forming energy. This energy is known as the “mass defect” where mass is converted into energy as shown in Einstein’s equation E = mc 2

7. 1997 D (c) Describe how α, β, and γ rays each behave when they pass through an electric field. Use the diagram below to illustrate your answer.

8. 1997 D (c) ANSWER Regular with no positive or negative charge With positive & negative in electric field β (beta) γ (gamma) α (alpha)

9. 1997 D (d) Why is it not possible to eliminate the hazard of nuclear waste by the process of incineration?

10. 1997 D (d) ANSWER The half – lifes of nuclear products have enormous time frames in order for it to decay all together. The process of incineration it would speed up the decay of half – life only a mere percentage.