Relative Stability of Different Nuclei Nuclear Stability Relative Stability of Different Nuclei

Two Methods Which isotopes? Binding Energy

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

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

Isotope trends among the elements:

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, O2 or O3? O2: O=O O3: O=O-O

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

Split up class and do:

Do all isotopes using Excel Isotopedata_stable.xls

Modes of Radioactive Decay

U-238 Decay Series And … the problem with radon.

Decay modes and the island of stability.