Use nuclear symbols to write a balanced nuclear equation for positron emission by nitrogen PDF

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Chapter 9: nuclear radiation 1.! Use nuclear symbols to write a balanced nuclear equation for positron emission by nitrogen−12.

2.! Would you predict aluminum−30 to be stable? •! No 3.! !The isotope indium−111 is used in medical laboratories as a label for blood platelets. To prepare indium−111, silver−108 is bombarded with an alpha particle, forming an intermediate isotope of indium. Use nuclear symbols to write a nuclear equation for the formation of this intermediate isotope.

4.! What is the composition of a beta particle? Select the single best answer. an electron a neutron a helium nucleus a proton

5.! Barium−131 is a radioisotope used to study bone formation. A patient ingested barium−131. How much time will elapse until only of the barium−131 remains, assuming that none of the isotope is eliminated from the body through normal processes? The half-life of barium−11.6 minutes (min). •! 0.46 6.! Use nuclear symbols to enter a nuclear equation to represent magnesium−24 decaying to neon−20 plus an alpha particle.

7.! A patient receives 5.5 ng of a radioisotope with a half-life of 12 hours. How much will remain in the body after 2.86 days, assuming that radioactive decay is the only path for removal of the isotope from the body? •! n = 2.86 days × 24 hours/1 day × 1 half life/12 hours= 5.72 half lives •! mf = mi (0.5)n •! mf = 5.5 ng × (0.5)5.72 = 0.10 ng

8.! What is meant by the term relative biological effect? •! A measure of the penetrating power of a particle. •! A measure of the energy of a particle. •! The amount of radiation that is fatal for 50% of the exposed population within 30 days. •! A measure of the potential damage that can be caused by types of radiation.

9.! Why would a Geiger counter be preferred to film for assessing the immediate danger resulting from a spill of some solution containing a radioisotope? •! A Geiger counter gives more precise measurements. •! A Geiger counter gives immediate results. •! A Geiger counter detects more different types of radiation than film.

10.!Barium−131 is a radioisotope used to study bone formation. A patient ingested barium−131. How much time will elapse until only 1/64 of the barium−131 remains, assuming that none of the isotope is eliminated from the body through normal processes? The half-life of barium−131 is 11.6 minutes (min).

•! 69.6 minutes...