1. Chemistry!! March 13, 2013 Ms. Boon

2. Catalyst Use your study guide to answer: What is the difference between temperature and heat? What is an acid and what is a base? Take out your HW! Objective: I can investigate practical uses of radioactive isotopes. Agenda: Catalyst Homework Review Radiocarbon dating

3. Homework Review p. 657 #1,2,5,6 1. The high energy electron that is emitted from from an unstable nucleus is called a beta particle. (p. 649)

4. Homework Review p. 657 #1,2,5,6 2. Both fission and fusion involve the changing of a nucleus. Fission involves splitting the nucleus and fusion involves combining two small nuclei to form a larger nucleus. Both processes release energy. Fusion produces more energy per gram of starting material than fission. (p. 654-656)

5. Homework Review p. 657 #5 a & b 2334229 U He Th 92290 66066 Cu e Zn 29-130

6. Homework Review p. 657 #5 c & d 94 13 1 12 Be + He C n+C 42 6 0 6 238 1 239 0 239 0 239 U + n U e + Npe + Pu 92 0 92 -1 93 -1 94

7. Homework Review p. 657 #6 33 1 1 4 He + He H+ H+He 22 1 1 2

8. Radiocarbon dating Video Focus Questions: 1. What are the three natural carbon isotopes and which is radioactive? 2. What material did the scientists start with? 3. What material was sent to the accelerator for dating? 4. How does the accelerator separate the different carbon isotopes? Video: http://www.youtube.com/watch?v=ErgdpG_N9vQ

9. Practice Element symbol and radioactive decay worksheet. For help on the radioactive decay worksheet: Read page 658-662 Focus on sample problems B & C Homework: Read p. 658-666 Do problems: p. 666 #4, 9, 10, p. 669 #25, 26, 27 Finish Radioactive Decay worksheet. Study for benchmark exam