1. Review six kinds of observational evidence that were used to support the atomic theory.
2. What three particles make up every atom? What are the major differences among these particles?
3. Review the basic elements of Rutherford's experiment. What evidence did Rutherford use to justify his discovery of the nucleus?
4. How does Bohr's model of the atom dif er from Rutherford's? How does the interaction of atoms and electromagnetic energy provide evidence for the Bohr model of the atom?
5. How might astronomers on Earth use spectroscopy to deter-mine chemical elements that occur in stars?
6. Describe the three difFerent ways that atoms can bond to-gether. Identify everyday objects that use each of these three chemical bonds.
7. When a chemical reaction takes place, it is noted that the temperature in the environment of the reaction drops. Is the chemical reaction endothermic or exothermic?
8. Is the melting of ice an endothermic process? Why or why not? Give everyday examples of endothermic and exothermic processes
9. What is rust? What substance is typically required for rust to form? What type of reaction leads to the rusting of iron and other metals?
10. Why does ice loat when placed in water? What roles do hydrogen bonding and polarity play in this phenomenon?