1. Nuclear Stability Relative Stability of Different Nuclei

3. Two Methods Which isotopes? Binding Energy

4. What holds an atom together? Forces of Nature and Atomic Structure:

5. Band (Island) of Stability N/Z ratio Number of stable isotopes

7. Isotope trends among the elements:

8. Binding Energy, but first… Comparing stability: O-O single bond strength = 146 kJ/mol O=O double bond strength = 496 kJ/mol Which is more stable, O 2 or O 3 ? O 2 : O=O O 3 : O=O-O

11. Predict what you think the trend will be: As atomic number increases, what will happen to stability?

12. Split up class and do:

13. Do all isotopes using Excel Isotopedata_stable.xls

14. Modes of Radioactive Decay

15. U-238 Decay SeriesAnd … the problem with radon.

17. Decay modes and the island of stability.