Indicate whether each of the following nuclides lies within the belt of stability in Figure 21.2: (a) neon- 24, (b) chlorine-32, (c) tin-108, (d) polonium-216. For any that do not, describe a nuclear decay process that would alter the neutron-to-proton ratio in the direction of increased stability. [Section 21.2]
WEEK 1 U5M1 Summary How do we predict chemical change To predict chemical reactions, we study o Directionality – determined by thermodynamic properties o Extent – determined by thermodynamic properties o Mechanism – determined by kinetic properties o Rate of process – determined by kinetic properties Chemical stability o reactions proceed in direction where more stable substances formed o Two “categories” – thermodynamic and kinetic Thermodynamic stability o Stability of the system regarding changes in temperature, pressure, addition of more substances, concentration Greater thermodynamic stability -> less likely to change states
