HSPS Unit 3 Atomic Structure, The Periodic Table and Radioactivity.docx

**Elements, Patterns on the Periodic Table and Radioactivity** **Part 1: Vocabulary -- define each vocabulary word.** 1. Isotope 2. Cation 3. Anion 4. Valence electron 5. Atomic Number 6. Atomic Mass 7. Octet Rule 8. Family or group 9. Period 10. Radioactivity 11. Isotope 12. A...

**Elements, Patterns on the Periodic Table and Radioactivity** **Part 1: Vocabulary -- define each vocabulary word.** 1. Isotope 2. Cation 3. Anion 4. Valence electron 5. Atomic Number 6. Atomic Mass 7. Octet Rule 8. Family or group 9. Period 10. Radioactivity 11. Isotope 12. Alpha particle 13. Beta particle 14. Chain reaction 15. Gamma Ray 16. Nuclear Fission 17. Nuclear Fusion 18. Half-life 19. Carbon Dating **Part 2: Short Answer** 1. What are some patterns on the periodic table? 2. How are valence electrons determined? 3. What are some negatives to nuclear reactor powerplants? 4. What are some positive to nuclear reactor powerplants? 5. Why are noble gases not reactive? 6. How many electrons are in each energy level (up to the third) 7. What is true of all atoms in the same family or group? 11. Make a model of nitrogen as atom, isotope, and ion. Then state what makes it different from the others. 12. Why is carbon-14 radioactive, pay attention the number of protons versus neutrons. 13. Draw a model of a neutrally charge oxygen, then draw oxygen as a anion.   14. The valence shell of a neutral atom loses two valence electrons. Which ions forms? 15. What is the primary different between two neighboring atoms on the periodic table? 16. What is the primary different between two top and bottom neighbors on the periodic table? 17. How many neutrons does Chromium-63 have? 18. All about hydrogen. Hydrogen Protons Neutrons Electrons ------------- --------- ---------- ----------- Hydrogen -1 Hydrogen -2 Hydrogen -3 19. Mystery elements:\ If an element is a good conductor of heat and electricity, where would it be on the Periodic Table?\ \ If an element is a semiconductor of heat and electricity, where would it be on the Periodic Table?\ \ If an element is a poor conductor of heat and electricity, where would it be on the Periodic Table? 20. What happens to unstable isotopes? 21. What are some arguments for using nuclear energy? What are some arguments against nuclear energy? 22. What is the process for nuclear fission? 23. What is the role of fusion in the Sun? 24. Which elements are likely to undergo fusion? 25. Which elements are likely to undergo fission? 26. Draw some conclusions about the graphics.  ---------------------------------------------------------------------- ------------------------------------------------------------------------------------------- A diagram of a diagram of a atom Description automatically generated  **Part 3: Practice Problems** 36. **A sample of Ra-226 has a half-life of 7 hours. If the original sample was 200 grams, how much of the sample would be left after 5 half-lives? How much time will have gone by after 5 half-lives?\ ** 37. **A sample of Sodium-24 decays to 30 grams in 4 half-lives. How much was the original sample?\ ** 38. **Rn-222 decays from 400 grams to 6.25 grams in 4 hours. How long is one "half-life"?\.66 of an hour or about 36 minutes\ ** 39. **What are some conclusions that can be drawn from this graph?**