Atomic and Nuclear P

Atomic and Nuclear P - 1 Which one of the following...

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Unformatted text preview: 1. Which one of the following correctly gives the number of electrons, protons and neutrons in a neutral atom of the nuclide Cu 65 29 ? Number of electrons Number of protons Number of neutrons A. 65 29 36 B. 36 36 29 C. 29 29 65 D. 29 29 36 (1) 2. In the Geiger-Marsden experiment, particles are scattered by gold nuclei. The experimental results indicate that most particles are A. scattered only at small angles. B. scattered only at large angles. C. absorbed in the target. D. scattered back along the original direction. (1) 3. A sample of radioactive carbon-14 decays into a stable isotope of nitrogen. As the carbon-14 decays, the rate at which the amount of nitrogen is produced A. decreases linearly with time. B. increases linearly with time. C. decreases exponentially with time. D. increases exponentially with time. (1) 1 4. Either of the two following graphs is useful in predicting nuclear energy changes in fission and fusion processes. X X Y Y Which one of the following correctly identifies the quantities X and Y? X Y A. atomic number total binding energy B. mass number total binding energy C. atomic number average binding energy per nucleon D. mass number average binding energy per nucleon (1) 5. The unified mass unit is defined as A. the mass of one neutral atom of 12 6 C. B. 12 1 of the mass of one neutral atom of 12 6 C. C. 6 1 of the mass of one neutral atom of 12 6 C. D. the mass of the nucleus of 12 6 C. (1) 2 6. This question is about nuclear reactions. (a) Complete the table below, by placing a tick ( ) in the relevant columns, to show how an increase in each of the following properties affects the rate of decay of a sample of radioactive material. Property Effect on rate of decay increase decrease stays the same temperature of sample pressure on sample amount of sample (2) Radium-226 ( 226 88 Ra) undergoes natural radioactive decay to disintegrate spontaneously with the emission of an alpha particle ( -particle) to form radon (Rn). The masses of the particles involved in the reaction are radium: 226.0254 u radon: 222.0176 u -particle: 4.0026 u (b) (i) Complete the nuclear reaction equation below for this reaction. 226 88 Ra ......... ......... + ......... ......... Rn (2) (ii) Calculate the energy released in the reaction. ........................................................................................................................... ........................................................................................................................... ........................................................................................................................... ..............................................................................................................................
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This note was uploaded on 09/21/2009 for the course PHYSICS 2211 taught by Professor Uzer during the Fall '08 term at Georgia Tech.

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Atomic and Nuclear P - 1 Which one of the following...

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