1. What is different about the forces between atoms in gaseous diatomic HF and LiF?

2. What types of forces hold the liquid together in liquid HF? In liquid LiF?

3. Why is the boiling point of LiF so much higher than that of HF?

4. Why is the melting point of LiF so much higher than that of HF?

5. Which liquid, HF or LiF, is more like liquid benzene? Why?

6. In which of the three phases - solid, liquid, or gas - will you find discrete molecules of HF? Is the situation the same for LiF?

7. What is the term for substances that behave like LiF?

8. Will LiF conduct electricity as a solid? Will it do so after being melted? What carries the electric current? Compare this with the conduction of electricity by a metal.

9. What role do the water molecules play when LiF is dissolved in water? Will LiF dissolved in water conduct electricity? If so, what carries the current?

10. What combines with what in the neutralization process? In what sense is neutralization the "canceling out" of an acid and a base?

11. When sodium hydroxide (NaOH) is neutralized by hydrochloric acid (HCl), what happens to the sodium ions? What would be left behind if the neutralized solution were evaporated to dryness?

12. What is meant when nitric acid is described as a strong acid, carbonic acid as a weak acid, and boric acid as extremely weak?

13. How do the relative electronegativities of atoms help to bring about the situation described in Question 12?

14. Why is beryllium oxide described as "amphoteric"? What kind of bonding holds crystalline BeO together?